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Violence in Ideological and Non-Ideological Groups: A Quantitative Analysis of Qualitative Data1 M D. M2  K E. B-A S T. H Penn State University University of Oklahoma D E  M S C J E Development Dimensions International, Inc. University of Oklahoma Multiple models have been proposed to account for violence among ideological groups. To identify critical variables contributing to violent behavior in these groups, violent ideological groups were compared to relevant comparison groups. A historically based content analysis was conducted to assess these groups with respect to a number of variables examining leader, group, organizational, and environmental attributes held to influence violence. Discriminant analyses revealed that violent ideological groups differed from comparison groups with respect to leader extremism, group righteousness, organizational indoctrination, and environmental conflict and disruption. Regression analyses revealed that these discriminant functions predicted a number of notable violent and ideological criteria. The implications of these findings for understanding the origins of violence in ideological groups are discussed. The images we see on television seem to suggest that there is something unique about ideology—extremist ideology—that gives rise to the propensity for violence. Groups such as Al Qaeda (Jordan & Boix, 2004; Post, 2005), White supremacists (Blazak, 2001; Henry, Sidanius, Levin, & Pratto, 2002), the militia movement (Pitcavage, 2001), and the Christian Identity Movement (Sharpe, 2000) all espouse extremist ideologies that have been used to justify violent acts ranging from the bombing of abortion clinics to the destruction of the World Trade Center. These acts, and their impact on people’s lives, have led scholars such as Moghaddam (2005) and Sternberg (2003) to call for a new wave of research that will allow us to develop a 1 The authors thank Matthew Allen, Gregory Ruark, and Amanda Angie for their contributions to the present effort. We also thank an anonymous reviewer whose comments were especially helpful in revising the manuscript. Parts of this effort were supported by a series of grants from the U.S. Department of Defense, Michael D. Mumford, Principal Investigator. 2 Correspondence concerning this article should be addressed to Michael D. Mumford, Department of Psychology, University of Oklahoma, Norman, OK 73019. E-mail: mmumford@ ou.edu 1521 Journal of Applied Social Psychology, 2008, 38, 6, pp. 1521–1561. © 2008 Copyright the Authors Journal compilation © 2008 Wiley Periodicals, Inc. 1522 MUMFORD ET AL. systematic understanding of the origins and consequences of ideological violence. Although few would dispute the value of research along these lines, it clearly represents a formidable undertaking. Despite their visibility, the emergence of violent ideological groups remains a rare event. As a result, it has proven difficult to conduct the kind of systematic quantitative studies necessary to begin developing general models specifying the key variables giving rise to extremist ideologies. One response, clearly the most common response to this problem, has been for scholars to conduct in-depth qualitative analyses examining the psychosocial dynamic of groups in which espoused ideology has led to acts of violence (e.g., Hoffman, 1999; O’Boyle, 2002; Staub, 1996, 2003). An alternative approach has been to examine underlying psychological processes; for example, threat (e.g., Cameron, Duck, Terry, & Lalonde, 2005; Navarrete, Kurzban, Fessler, & Kirkpatrick, 2004) and outgroup stereotyping (e.g., Haslam et al., 1998; Hewstone, Rubin, & Willis, 2002) that might give rise to violent behavior. Both qualitative case analysis and experimental studies of group process have proven useful in understanding the origins of ideological violence. However, a third approach is available that might also prove of some value. Simonton (1991) argued that rare events may also be studied using a historiometric approach. The historiometric approach entails the quantitative analysis of multiple qualitative cases cumulated over time. Indeed, this approach has proven useful in understanding other rare events, such as eminent achievement in the arts and sciences (Simonton, 1999), as well as outstanding, historically notable leadership (Mumford, 2006). Our intent in the present study is to apply historiometric techniques in a quantitative analysis of multiple case studies of ideological groups with the intent of identifying leadership, group process, organizational, and environmental variables that uniquely characterize violent ideological groups. Ideological Groups Groups form and create institutions for many reasons. For example, groups may form for purely instrumental and pragmatic reasons. A case in point may be found in industrial organizations where division of labor in the group promotes economic gain (Katz & Kahn, 1978). Groups may also form to facilitate association, as is the case for most clubs. Groups, however, may also form to provide members with a sense of identity and a structure for interpreting and acting on their world (Vigil, 2003). Although groups may form for many reasons, ideology provides a noteworthy, and potentially important, basis for the formation of groups and VIOLENCE AND IDEOLOGY 1523 institutions (Thompson & Bunderson, 2003). Ideology is reflected in the formation, adoption, and articulation of a set of beliefs and values that are held to represent a unique and universal good: an inherently right, correct, and just worldview (Blau, 1964). Ideology, however, represents something more than a set of beliefs about what is right. Rather, ideology entails an integrated set of values and goals that assume unique status in which attainment of salient goals, or failure to attain these goals, is held to be determined by a fixed, relatively rigid, set of beliefs about the causes influencing goal attainment and failures in goal attainment (Murray & Cowden, 1999). In other words, ideology involves a mental model specifying desirable goals and the causes shaping goal attainment (Strange & Mumford, 2005). This mental model is imposed as an interpretive structure for understanding and reacting to events; a wide range of events in the case of powerful ideologies such as 20th century communism or 21st century millennialism. Ideological groups arise when a mental model defining goals and causes is adopted by a number of individuals who apply this model as a vehicle for understanding and acting in uncertain situations (Friedland, 2001). Ideological groups may prove attractive to people for a number of reasons. First, ideology provides people with a framework for understanding their world and interpreting crises that occur in their lives (Mumford, 2006). Second, ideology provides people with a sense of identity and meaning (Shamir, House, & Arthur, 1993). Third, ideology, vis-à-vis valued goals, provides a basis for acquisition of feelings of self-esteem (Aberson, Healy, & Romero, 2000). Fourth, and finally, ideology allows people to reduce uncertainty and define viable courses of action through the normative prescriptions embedded in mental models (Hogg, 2003). Understanding crisis events, reducing ambiguity, providing a sense of identity, and enhancing self-esteem all appear to represent powerful forces that attract people to ideological groups. However, a number of variables operating at multiple levels of analysis have been found to influence the emergence and maintenance of ideological groups. For example, effective articulation of an ideology by charismatic leaders who evidence an ascetic commitment and a willingness to sacrifice for the ideology appears to be critical to the formation of ideological groups (Yorges, Weiss, & Strickland, 1999). Leader articulation and symbolic embodiment of an ideology, however, often arises from prolonged exposure to failed social models (Strange & Mumford, 2005), with leaders evidencing a commitment to resolve injustice that has arisen from these failed models (Moghaddam, 2005). Although the creation and articulation of an ideology by leaders is a necessary precondition for the emergence of ideological groups, the behavior and maintenance of these groups is influenced by a number of processes operating at the group level. For example, ideological groups often establish 1524 MUMFORD ET AL. strong group boundaries whereby entry into the group requires some degree of self-sacrifice and overt acceptance of certain symbolic commitments (Byman, 1998; Gerstenfeld, Grant, & Chiang, 2003; Gordijn, Wigboldus, & Yzerbyt, 2001): strategies intended to encourage adoption and internalization of the ideology. Once people have joined the group, social learning and peer role modeling serve to reinforce and elaborate the ideology being advocated (Burdman, 2003; Crenshaw, 1988; Lee & Leets, 2002; Tindale & Kameda, 2000). This social learning will often be associated with affective framing of select events that articulate the “rightness” of the ideology (Wood, 2000) and the need for urgent action (Spoor & Kelly, 2004), with these affective framing actions serving to create the commitments that lead the group to become a salient aspect of members’ identity (Monroe, Hankin, & Van Vechten, 2000). Ideological groups not only establish processes that serve to inculcate ideology, they also create institutional systems that serve to reinforce and maintain the group. Thus, Blazak (2001) has found that to offset high dropout rates, ideological groups will typically create strategies and structures to promote member recruitment. Not only do ideological organizations stress recruitment, they adopt practices and policies (e.g., training, mentoring) intended to replace extant systems for understanding events (i.e., sense breaking) with new interpretive frameworks (i.e., sense making) consistent with the organizations’ ideology (Combs, 2003; Pratt, 2000; Schwartz & Kaslow, 2001). These organizational practices are typically subject to tight control and monitoring by a key leadership cadre (a form of clan control) known to be highly committed to the ideology (Strange & Mumford, 2002; Zawodny, 1983). Ideological groups, and the organizational policies and practices that maintain these groups, do not exist independent of their environment. One common explanation for the emergence of these groups is a lack of direction, structure, and opportunity induced by a chaotic environment in which traditional paths to success have been undermined by socioeconomic conditions (Post, Ruby, & Shaw, 2002; Staub, 2003). Cultural dislocation and the loss of traditional patterns of social interaction have also been linked to the emergence of ideological groups if the ideology provides a framework for understanding and responding to change (Combs, 2003; Hoffman, 1999). Violence and Ideology Although ideological groups display some distinctive characteristics— characteristics that at times may predispose these groups to violence—it should also be recognized that many ideological groups exist that do not VIOLENCE AND IDEOLOGY 1525 exhibit violence. This observation, in turn, begs a question: What are the unique characteristics of ideological groups that advocate and initiate violence? Given the influence of leadership on the formation and behavior of ideological groups, it seems plausible to argue that leader characteristics may represent a contributing factor to group violence. In fact, narcissism, a sense of superiority, and feelings of pride have been linked to the propensity of leaders to induce violence (O’Connor, Mumford, Clifton, Gessner, & Connelly, 1995) and violence on the part of terrorist groups (Atran, 2003; Cordes, 2001; Crayton, 1983). Associated with narcissistic pride, however, is often a sense of fear or uncertainty (Atran, 2003; O’Connor et al., 1995), which also appears to induce violence. Fear and narcissism, furthermore, when combined with rigid application of an ideological mental model, may lead to systemic distortion of information, which gives rise to misunderstanding of others’ intentions; misunderstandings that may promote violence. Not only can leader characteristics engender violence, violence may become more likely in groups evidencing certain kinds of interactions. More specifically, conflict and group rivalry can threaten group ideology. This threat, in turn, can result in the acquisition of negative views of others and the dehumanization of rival group members, thereby leading to violence (Paladino et al., 2002; Staub, 2004), especially when negative emotions are activated by events that threaten group members and the legitimacy of their ideology (Spoor & Kelly, 2004; Stroessner, Mackie, & Michalsen, 2005). There are two other characteristics of ideological groups that may act to increase the likelihood of out-group dehumanization and violence. First, by virtue of the justification provided for dehumanization and violence, groups that feel victimized and that evidence a strong sense of moral superiority may be especially violence-prone (Moghaddam, 2005; Staub, 2004). Second, violence may be encouraged by the requirement that people surrender individual identity in service to group identity (Post et al., 2002). In addition to group process, certain characteristics of the structure and practices of ideological organizations may serve to make some groups especially prone to violence. McCormick (2003), for example, argued that fractionalization, coupled with attempts to induce centralized control through cliques may promote violence as a technique for acquiring political power within the group. Although certain structural characteristics of organizations may promote violence, it seems likely that organizational processes that act to legitimize violence—for example, use of violence and punishment as control mechanisms—will exert particularly powerful effects on the proclivity of certain ideological groups toward violence (Vigil, 2003). Along with organizational structure and policy, it is possible that the socialization practices applied by certain ideological organizations may 1526 MUMFORD ET AL. influence their propensity for violence. Socialization into ideological organizations often involves sense breaking and sense making (Pratt, 2000). However, if sense breaking is framed in terms of opposition to other existing groups—groups that are viewed as exploitive—then the potential for dehumanization and violence will increase. As a result, violent ideological groups and organizations often are characterized by the use of propaganda, extensive indoctrination, and the articulation of new cultural symbols (Burdman, 2003; Harré, 2004; Pitcavage, 2001). As was the case with regard to the formation of ideological groups, there is reason to suspect that certain environmental conditions may act to promote violence among ideological groups. As might be expected based on our foregoing observations, environmental conditions giving rise to perceptions of victimization and injustice—such as corruption, unfair distribution of resources, and limitations of opportunity (especially for ambitious middle-class youths)—all seem linked to the emergence of violent ideological groups (Ehrlich & Liu, 2002; Staub, 2004). In addition to socioeconomic conditions, social conditions giving rise to a climate of violence (e.g., group rivalry, societal fragmentation, fear of status loss) appear to encourage violence as a result of perceived threat (Cordes, 2001). In this regard, however, it is important to bear in mind that for ideological groups, where the existence and identity of a group is tied to a mental model or worldview, the existence of competing ideologies in the society may prove particularly threatening and a potentially powerful source of violence. Taken as a whole, it appears that multiple variables—that is, variables linked to leadership, group process, organizational practices, and environmental conditions—may act to promote violence among ideological groups. Accordingly, our intent in the present study is twofold. First, we hope to demonstrate that violent ideological groups differ from (a) violent nonideological; (b) nonviolent ideological; and (c) nonviolent nonideological groups with regard to leadership, group process, organizational practices, and environmental conditions. To illustrate, we expect to find that violent, ideological groups will be led by individuals evidencing an extreme, rigid ideology, as well as a strong sense of superiority. These leader characteristics, in turn, will likely perpetuate the internalization of superiority within the group, resulting in higher levels of self-righteousness among members. We also expect that groups willing to commit violent acts will have to sanction and legitimize those acts through organizational policies and procedures. Moreover, we anticipate that such violence will only occur in environments characterized by conflict and turmoil. After examining these group differences, we hope to demonstrate also that these differences are, indeed, related to relevant violent and ideological outcomes. VIOLENCE AND IDEOLOGY 1527 Method Sample The sample applied in the present study consisted of 80 groups. The groups included in the sample were selected such that half were ideologically based, while the other half were nonideological. Half the ideological and half the nonideological groups examined in the present study were known to have been involved in violence, while the remaining half were not involved in violence. Of the 20 groups examined in each cell of this 2 (Ideological: yes or no) ¥ 2 (Violent vs. Nonviolent) design, half were to be drawn from Western cultures and half from non-Western cultures to ensure some generalizability in the conclusions flowing from the present study. Group Definition To identify the groups to be examined in the present study, the following criteria were applied. A group was considered violent if at least 10 acts of violence (e.g., robberies, murders) had resulted from the actions of group members where (a) the act of violence could be directly attributed to group members; (b) multiple group members were involved in the act; (c) the act of violence was sanctioned by the group; and (d) multiple group members were involved in planning the actions that led to violence. A group was considered nonviolent if no acts of violence involving multiple group members and group-based planning occurred over the course of the groups’ existence. Ideological and nonideological groups were identified on the basis of the following considerations. A group was considered ideological if (a) the basis for formation of the group was a shared mental model or image about the general good and the actions that must be taken to bring about this good; (b) group members applied this mental model in interpreting a wide range of events; (c) the group sought to recruit new members based on this model; and (d) new group members were expressly educated and socialized to ensure internalization of this model. A group was considered nonideological if the basis for group formation and member recruitment was utilitarian and the group made no attempt to advance a global image of a greater good. In addition to these considerations, three other criteria were applied in selecting the groups to be examined in the present study. First, a group was considered for inclusion in the study only if it was based on voluntary association. Second, these voluntary associations could not have been 1528 MUMFORD ET AL. formed under the auspices of a broader institutional entity, a state, corporation, or religion, to ensure that the group represented a distinct entity. Third, to ensure that adequate historically verifiable information was available, only groups operating in the 20th century were considered as candidates for inclusion in the sample. Group Selection After defining these criteria, a review of bibliographic sources was used to identify in-depth qualitative analyses examining the origins and practices of various social groups. These in-depth qualitative analyses were to be presented in the form of a book or monograph seeking to provide a comprehensive description of the origins and practices of the group. To be considered for use as a basis for describing a group, the book or monograph was required to be at least 150 pages long and prepared as an objective academic analysis. Thus, analyses conducted by or supported by the group were not considered for inclusion in this study. Application of these criteria led to the identification of some 250 qualitative analyses that might be used to describe relevant groups. The material presented in these books was then reviewed by two psychologists. Based on this material, the group under consideration was classified into the ideological versus nonideological, violent versus nonviolent, and Western versus non-Western categories. In each cell that the analyses retained (only one per group) were those that (a) presented multiple verifiable incidents of group behavior; (b) provided adequate documentation for these observations; and (c) received favorable academic reviews. Figure 1 presents the groups identified for inclusion in the present study. The reference list provides the citations for the source material used to describe the groups. As can be seen, most violent ideological groups identified in this review were terrorist or political advocacy groups, while most of the violent nonideological groups identified in this review were criminal groups. Nonviolent ideological groups and nonviolent nonideological groups included social service, issue advocacy, and political advocacy groups involved in a range of issues. These characteristics of the group classification, of course, speak to the construct validity of the selection procedures applied with regard to common conceptions of groups (e.g., violent ideologies are commonly held to be associated with terrorism). They also indicate that the groups under consideration provided a plausible and appropriate basis for making comparisons with respect to leadership, group process, organizational policies, and environmental conditions. VIOLENCE AND IDEOLOGY WESTERN NONVIOLENT VIOLENT IDEOLOGICAL 1529 NONIDEOLOGICAL 1. The Revolutionary Organization 17 Novembers 2. Ku Klux Klan 3. ETA (Basque separatist movement) 4. Baghwan Shree Rajneesh (Osho) 5. Black Panthers 6. Earth Liberation Front 7. Aryan Republican Army 8. IRA 9. Molly Maguires 10. IRGUN 1. Hell’s Angels 2. Vice Lords 3. Latin Kings (New York) 4. Cardiff Soul Crew 5. The Tison Gang 6. The Purple Gang 7. The Chicago Outfit 8. La Cosa Nostra 9. American Mafia 10. Red Mafiya 1. Japanese Red Army 2. Al-Jihad 3. Al-Qaeda 4. Hizbullah 5. Aum Shinrikyo (aka Aum Supreme truth) 6. Tupac Amaru Revolutionary Movement 7. Palestinian HAMAS 8. Popular Front for the Liberation of Palestine 9. Shining Path 10. Communist Party of the Philippines 1. Hong Kong Triad 2. Zimbabwe Land Grabbers 3. Shower Posse 4. Chinese Triad 5. Chinatown Born to Kill Gang 6. Colombian Medellin cocaine cartel 7. Japanese Yakuza 8. Shanghai Green Gang 9. Jamaican Posse 10. Cali Cartel 1. Mothers Against Drunk Driving 2. Masons 3. YMCA 4. National Education Association 5. Salvation Army 6. National Rifle Association 7. Habitat for Humanity 8. Polish Solidarity Movement 9. Russian Liberation Movement 10. ACLU 1. Oxfam 2. American Red Cross 3. American Legion 4. Big Brothers/Big Sisters of America 5. NCAA 6. Lions Club 7. Farm Labor Organizing Committee 8. Doctors Without Borders 9. Friends of the Library 10. London Charity Organization Society 1. Revolutionary Association of Women in Afghanistan (RAWA) 2. Organization of African Unity 3. Indonesia Solidarity 4. Ethiopian Revolutionary Party 5. Indian Women’s Movement 6. Dalit Movement 7. The Industrial and Commercial Workers’ Union of Africa 8. May Fourth Movement 9. Iranian Islamic Women’s Movement 10. Society of the Muslim Brothers in Egypt 1. Mothers of the Plaza de Mexico 2. Olympic Organizing Committee 3. Red Crescent 4. Self-Employed Women’s Association 5. Jordanian Hashemite Fund for Human Development 6.Working Women’s Forum 7. ECOMOG 8. East African Flying Doctor Service 9. Amazonian Indigenous Rights Movement 10. Green Belt Movement Figure 1. Groups examined. Predictors A content analysis of the material presented in these qualitative analyses was used to assess the groups with respect to leadership, group processes, organizational policies, and environmental conditions. Initially, a 1530 MUMFORD ET AL. psychologist familiar with the literature on group behavior was asked to review the book or monograph summarizing the findings obtained in the qualitative analysis. The psychologist was then asked to identify the two chapters that provided the most complete, detailed description of the characteristic behavior of group members. A reliability check indicated greater than 90% agreement in the chapters selected as having the greatest value in describing the behavior of the group. These chapters were typically 20 to 30 pages in length, and contained 320 to 390 words per page. The material presented in these chapters provided the basis for the content analysis examining predictors of group violence and ideology. The predictors applied in the present study were based on a review of the available literature examining violent ideological groups (e.g., Moghaddam, 2005; Post et al., 2002; Staub, 2004). The literature review was used to identify variables linked to both ideology and violence with respect to leader characteristics (e.g., superiority, narcissism, negative life themes, value crystallization, sense of injustice), group processes (e.g., victimization, submergence of individual identity, strong group boundaries, identity expression through group), organizational policies and practices (e.g., sense making, violence as control, ritualized investment, systematic recruitment), and environmental conditions (e.g., economic exploitation, presence of other ideological groups, loss of institutions, strong traditional culture). Overall, 15 to 26 potential predictors were identified at each level of analysis. Table 1 presents the list of predictors to be examined at each level of analysis. With regard to the predictors identified on the basis of the literature review, four other points are worthy of note. First, predictor dimensions were selected to cover a wide range of theoretical perspectives on both group violence and ideological groups. Second, predictors were selected that had received some attention in a number of different models of ideological violence. Third, an attempt was made to minimize redundancy among dimensions within a given level of analysis. However, because some variables operate in different forms across levels (e.g., injustice, victimization), no attempt was made to eliminate cross-level redundancies. Fourth, and finally, predictors were defined in terms of the variables operating within the relevant level of analysis. After a list of potential predictor variables had been specified, a set of rating scales was developed to be applied in content analysis of the relevant qualitative material. Initially, behavioral or event-based operational definitions were developed for each predictor. After these operational definitions had been developed, a set of potential behavioral or event markers were developed for assessing expression of a predictor by the groups. These behavioral and event markers were generated using a variation on the procedures recommended by Gessner, O’Connor, Clifton, Connelly, and Mumford Table 1 Predictor Variables at Leader, Group, Organizational, and Environmental Levels Individual 1. Negative life themes 2. Superiority/narcissism 3. Entitlement 4. Low openness 1. Victimization 2. Negative mental models 3. Group feelings of superiority 4. Group rivalry 5. Group exclusivity 6. Strong group boundaries 7. Selective interpretation 7. Strong group affect of information 8. Information distrust 8. Submergence of individual 9. Stereotypic normalcy 9. Strong group values Organizational Environmental 1. Violence as control 2. Punishment as control 3. Resource control 1. Social conflict 2. Loss of social patterns 3. Loss of institutions 4. Clan control 4. Middle class marginalization 5. Loss of opportunity 6. Fear of social loss 5. Fractionalization 6. External conflict 7. Turbulence 8. Centralization 9. Formalization 7. Disappointed social expectations 8. Disruptive environmental events 9. Corruption VIOLENCE AND IDEOLOGY 5. Reality distortion 6. Compartmentalization Group 1531 Individual Group Organizational 10. Sensitivity to injustice 10. Extensive socialization 10. Isolation of members 11. Value crystallization 12. Personal self-sacrifice 11. Peer group influence 12. Group sacrifice 11. 12. 13. Disregard for time 13. Value-based 13. recruitment 14. Symbolic commitments 14. 14. Commitment to like-minded others 15. Redemptive life events 15. Identity expression through group 16. Strong enculturation 17. Extreme anchoring Environmental 10. Inequitable resource distribution Close supervision 11. Economic exploitation Denigration of external 12. Economic displacement institutions Rituals 13. Strong cultural traditions Sense breaking 14. Threats to tradition 15. Sense making 15. Globalization 16. Sacrifice for organization 17. Recruitment by investment 16. Anomie 17. Rivalry 1532 MUMFORD ET AL. Table 1 Continued 18. Channeled social commitment 19. Exposure to ideological leaders 20. Ascetics 21. Personal self-sacrifice 22. Interest in ideological material 18. Emphasis on organizational commitment 19. Training in ideology 19. Multiple ideological groups VIOLENCE AND IDEOLOGY 20. Mentoring 21. Value-based policies 22. Rewards for value congruence 23. Extended life influence of organization 24. Value-based communication 25. Idolization of leadership 26. Protection of ideological core 18. Fragmentation 1533 1534 MUMFORD ET AL. (1993), and Mumford, Costanza, Connelly, and Johnson (1996). In this procedure, a panel of four psychologists—all doctoral students familiar with the groups literature—were asked to generate behaviors or events that would indicate the operation of a given dimension using the relevant operational definition. The pool of potential markers was then reviewed by two senior psychologists for construct relevance, construct coverage, likely appearance of these markers in qualitative analyses, and clarity of interpretation. Markers that failed to meet these criteria after editing were eliminated. Typically, 20 to 30 markers were developed for each dimension, of which 10 to 20 survived the review process. This pool of candidate markers was then presented to a panel of four psychologists. Panel members were asked to rate each marker on a 5-point scale with respect to the substantive significance of the relevant behavior or event for assessing the dimension of interest. These substantive significance ratings produced interrater agreement coefficients above .90. The five markers that revealed the highest average substantive relevance ratings, and had the lowest standard deviations, were to be applied in assessing the qualitative data describing group behavior. Table 2 presents examples of these markers. In applying these markers to assess the group’s status on the relevant predictor dimensions, four judges—again, all doctoral students in psychology familiar with the group’s literature—were asked to read through each chapter. After reading through a given chapter, they were asked to rate on a 5-point scale the extent to which behavior or events similar to the critical markers identified for a predictor dimension appeared in the chapter. The average of these ratings across the two chapters drawn from the qualitative analysis obtained for a group provided the group’s score on each predictor dimension. Prior to evaluating the qualitative material using these ratings scales, the four judges received 40 hours of training. In the training, the judges were familiarized with the operational definition of each dimension and all of the relevant behavioral and event markers. They were then asked to practice applying the rating scales to a set of sample chapters. After making their ratings of the sample chapters, judges met to discuss their ratings and to resolve any discrepancies. It is of note that in making the ratings, judges were rotated across chapters to minimize fatigue and order effects. Application of these procedures resulted in adequate interrater agreement coefficients. Using the procedures suggested by Fleiss and Shrout (1979), the mean interrater agreement coefficient obtained for the leader, group, organizational, and environmental dimensions were .82, .85, .75, and .78, respectively. Some evidence for the construct validity of these ratings was obtained by examining the correlations among the predictor dimensions. For example, Table 2 Examples of Markers for Leader, Group, Organizational, and Environmental Predictors Individual Organizational Victimization Violence as Control Members who disobey Ridiculed by public organizational rules are Members killed/beaten by other groups beaten or killed Forced to meet in hiding Members who attempt to Petitions government about leave the organization unfair treatment are threatened with Talks about unfair violence treatment at rallies Culture includes stories of past violence Leaders carry weapons Violent acts are committed against families of disobedient members Environmental Social Conflict Competing religious groups in region Rival ethnic groups in region Groups make claims for same objects Discontentment over large differences in socioeconomic status Reign of unpopular leader VIOLENCE AND IDEOLOGY Sensitivity to Injustice Contacts government officials regarding unjust events Boycotts organizations for unjust acts Speaks of what is “right” and “wrong” Gives resources to those who have been treated unfairly Avoids business dealings with people who are viewed as unjust or improper Group 1535 Individual Low Openness Group Group Feelings of Superiority Sudden break in Advocates extreme policies communication with Rallies reference a need for others who have different radical change views Propaganda uses terms like Owns very specific and “destiny” or “ordained” narrow collection of Identifies specific targets books or literature necessary for change Avoids debate about beliefs tooccur and values Propaganda states that Members of individual’s group will change the social circle are similar in world nationality or culture Performs actions for group without asking for reasons Organizational Environmental Sense Breaking Economic Exploitation Propaganda uses explicit examples of “inequalities” Members are told they are not respected by society Members are required to think of, or meditate on, unfulfilled aspects of life Repeatedly blames the same organization for problems Members are forbidden to associate with others outside of the organization Infrequent changes in dominant group leadership Dominant group withholds resources Few laws protecting workers’ rights Few educational opportunities for lower class Extremely low wages for lower class 1536 MUMFORD ET AL. Table 2 Continued Strong Group Culture Performs rituals/ ceremonies that emphasize beliefs and values Distributes materials that articulate beliefs and values Attire reflects belief system Recites oaths at meetings Refers to values/principles when making group policy decisions Rituals Rituals and ceremonies are considered “sacred” or “holy” Rituals kept secret from outsiders Use of symbolic items at organizational meetings Ceremonies or rituals for successful completion of missions High degree of affect during rituals Strong Traditional Culture Region has multiple monuments to historical leaders Majority of region participates in same rituals for number of years Common hierarchy is evident in non-work venues (e.g., churches) Members of population engage in customs of past Current problems in legal system are interpreted using past framework VIOLENCE AND IDEOLOGY Sense of Asceticism Practices self-disciplined religious activities (e.g., fasting) Mentions importance of purity of lifestyle Home and office are simple and nonextravagant Only purchases simple and necessary foods Leisure activities require self-discipline (e.g., martial arts) 1537 1538 MUMFORD ET AL. value crystallization among leaders was positively related to sensitivity to injustice (r = .53) and exposure to other ideological leaders (r = .32), but not to information distrust (r = .15). Identity expression through the group was positively related to submergence of the individual (r = .47) and group sacrifice (r = .34), but not value-based recruitment (r = .08). At the organizational level, sense breaking was positively related to isolation of members (r = .38), but not factionalization (r = .16) or the use of violence as a control (r = .18). Similarly, at the environmental level, social conflict was positively related to fear of social loss (r = .53), but not strong cultural traditions (r = .23). Additional evidence pointing to the meaningfulness, or construct validity, of these ratings was obtained by examining the cross-level correlations. Here, it was found that social conflict was positively related to group rivalry (r = .40), but not peer group influence (r = .16); while isolation of members was positively related to strong group boundaries (r = .56), but not value-based recruitment (r = .11). Criteria and Controls The criterion information was drawn from either the prologue or epilogue chapters of the qualitative analysis of group activities. These prologue or epilogue chapters provide a summary of the social consequences of the group’s activities. These summaries of the group’s social impacts were reviewed by four judges—again, all doctoral students in industrial and organizational psychology—to assess the kind of violent behaviors manifested by a group and effective dissemination of the group’s ideology. With regard to violence, judges were asked to appraise (a) the amount of violence engaged in by the group; (b) the severity of the group violence; (c) whether the targets of the violence were other groups; (d) whether the targets of the violence were institutions; and (e) whether the targets of the violence were cultural. With regard to ideology, judges were asked to appraise (a) initiation of mass movements; (b) effectiveness of member recruitment; (c) amount of change involved in institutions; (d) amount of change induced in society; and (e) number of positive contributions. Appraisals of the violence and ideology criteria were based on 5-point ratings made by judges following their review of the material presented in the prologue or epilogue. It is of note that different judges were used to evaluate this material than those who reviewed the predictors. Additionally, it should be noted that judges were unaware of the study predictions, group selection procedures, or group cell breakdown (i.e., violent and ideological; nonviolent and ideological, and so forth), thereby limiting some of the potential biasing effects arising from the knowledge of study intention. Moreover, the judges VIOLENCE AND IDEOLOGY 1539 were exposed to an 8-hour training program prior to making the ratings where (a) the nature of the rating scales was described; (b) judges practiced making ratings using sample material; and (c) judges discussed discrepancies to clarify the nature of the ratings. The average interrater agreement coefficient obtained for the violence ratings was .83, while the average interrater agreement coefficient obtained for the ideology ratings was .81. At the time judges were appraising group outcomes with regard to violence and ideology, requisite control variables were also obtained. These controls examined either characteristics of the qualitative analysis or characteristics of the group. The use of these control variables allowed for the statistical removal of effects that may have influenced ratings. For example, by controlling for length of the materials rated, potential fatigue effects can be removed from the observed results. Selection of control variables was based on previous studies employing similar methodology (e.g., Mumford, 2006; Simonton, 1991). The qualitative analysis controls included the following: (a) amount of detail presented in the book; (b) strength of documentation provided by the author; (c) evidence of firsthand reports (e.g., use of quoted speeches, communications); (d) author’s or authors’ origin in the same country as the group; (e) whether the author’s or authors’ first language was or was not English; (f) overall length of the book; (g) length of chapters selected for predictor rating; and (h) length of chapters selected for criteria rating. The group controls included time of group establishment, whether the group was currently in existence, size of group at the time of formation, group’s origin in an industrialized or non-industrialized country, and group’s social basis (e.g., political, religious, social, military, business). These control variable ratings produced interrater agreement coefficients above .90. Analyses To examine whether leadership, group process, organizational practices, and environmental variables could be used to identify violent ideological groups and account for violence and ideological outcomes, a two-stage analytical strategy was applied. Initially, a set of discriminant analyses was conducted to identify the variables that accounted for the unique characteristics of violent and ideological groups. These discriminant analyses were conducted within a given level of analysis (e.g., leader, group, organizational, environmental) where all analyses were based on a comparison of four groups: (a) violent ideological groups; (b) nonviolent ideological groups; (c) violent nonideological groups; and (d) nonviolent nonideological groups. The resulting discriminant functions provided dimensions summarizing the 1540 MUMFORD ET AL. differences between the groups. Scores on these functions provided the basis for the second set of analyses. In the second set of analyses, scores on the violence and ideological outcome measures were regressed on discriminant function scores. In these regression analyses, scores on the qualitative analysis and group characteristics controls were entered as the first block of predictors to ensure that potential artifacts were taken into account before examining the relationship of discriminant function scores to violence and social outcomes. It is of note that in these blocked regression analyses, a control variable was retained only if it was significant beyond the .05 level. Results Discriminant Analyses Table 3 presents the results obtained in the discriminant analysis examining the ability of leadership predictors to account for the four groups under consideration. Of the three functions obtained in this analysis, two produced significant discrimination of the four groups. The variables yielding sizable loadings on the first function include sensitivity to injustice (r = .37), disregard for time (r = -.37), low openness (r = -.35), and sense of superiority (r = -.32). Urgent feelings about injustice and the awareness of others implied by these loadings led this function to be labeled social concern. As might be expected, violent ideological groups (M = -.65) and particularly violent nonideological groups (M = -3.05) evidenced lower scores on this dimension than did nonviolent ideological groups (M = 1.76) or nonviolent nonideological groups (M = 1.94). Although violent ideological groups differed from violent nonideological groups in that they evidenced somewhat greater social concern, violent ideological groups differed from other groups with respect to leader attributes in terms of ideological extremism. This ideological extremism function was defined by commitment to like-minded others (r = .54), reality distortion (r = .43), value crystallization (r = .42), sensitivity to injustice (r = .40), selective interpretation of information (r = .36), and sense of superiority (r = .34). As noted previously, violent ideological groups (M = 2.47) obtained far higher scores on this dimension than did nonviolent groups—both ideological (M = -0.42) and nonideological (M = -0.78)—and violent nonideological groups (M = -1.27). Apparently, ideological violence is uniquely linked to reality distortion and rationalizations associated with adoption of a rigid belief and value structure. Cell means, and their respective comparisons to the other group means, can be seen in Table 4. VIOLENCE AND IDEOLOGY 1541 Table 3 Summary of Discriminant Analysis Results for Leadership, Group, Organization and Environment Predictors Social Concern (R = .90), c2 = 210.65, p < .001 Disregard for time (r = -.37) Sensitivity to injustice (r = .37) Low openness (r = -.35) Sense of superiority (r = -.32) Sense of asceticism (r = .26) Compartmentalization (r = -.22) Oppositional Bonding (R = .89), c2 = 168.94, p < .001 Group rivalry (r = .59) Negative mental models (r = .55) Strong group boundaries (r = .40) Group exclusivity (r = .35) Submergence of individual (r = .26) Leadership Ideological Extremism (R = .83), c2 = 98.10, p < .001 Commitment to like-minded others (r = .54) Reality distortion (r = .43) Value crystallization (r = .42) Sensitivity to injustice (r = .40) Selective interpretation of information (r = .36) Sense of superiority (r = .34) Group Ideological Righteousness (R = .73), c2 = 61.60, p < .001 Group feelings of superiority (r = .68) Strong group values (r = .56) Victimization (r = .53) Strong group affect (r = .40) Group sacrifice (r = .32) Ideological Exposure (R = .50), c2 = 98.10, p > .10 Sense of entitlement (r = -.32) Exposure to ideological leaders (r = .28) Information distrust (r = .22) Symbolic Expression (R = .34), c2 = 9.31, p > .10 Group rivalry (r = .34) Value-based recruitment (r = .21) Symbolic commitments (r = .16) 1542 MUMFORD ET AL. Table 3 Continued Extensive socialization (r = .25) Violence as a Control (R = .91), c2 = 213.31, p < .001 Denigration of external institutions (r = .50) Violence as control (r = .48) Recruitment by investment (r = .45) Clan control (r = .45) Punishment as control (r = .39) Isolation of members (r = .36) External conflict (r = .30) Social Conflict (R = .70), c2 = 100.17, p < .001 Multiple ideological groups (r = .62) Fragmentation (r = .54) Rivalry (r = .53) Symbolic commitments (r = .29) Organization Ideological Indoctrination (R = .81), c2 = 100.65, p < .001 Sense breaking (r = .42) Sacrifice for organization (r = .33) Sense making (r = .30) Value-based communication (r = .26) Training ideology (r = .24) Environment Social Disruption (R = .53), c2 = 54.98, p < .05 Inequitable resource distribution (r = -.38) Fear of social loss (r = .33) Multiple ideological groups (r = .31) Organizational Framing (R = .64), c2 = 33.30, p < .10 Training in ideology (r = .41) Isolation of members (r = .29) Value-based communication (r = -.26) Denigration of external institutions (r = -.22) Institutional Replacement (R = .62), c2 = 22.67, p >.10 Loss of institutions (r = .30) Corruption (r = -.29) Inequitable resource distribution (r = .25) VIOLENCE AND IDEOLOGY 1543 Table 3 Continued Social conflict (r = .47) Social conflict (r = .30) Fear of social loss (r = .43) Threats to tradition (r = .41) Economic displacement (r = .40) Loss of social pattern (r = .28) Fragmentation (r = .23) Middle-class marginalization (r = .22) Fragmentation (r = -.16) Note. R = canonical correlation; c2 = chi square for the discriminant function; r = loading of variables on discriminant function. The results obtained in the discriminant analysis conducted for the group predictors are also presented in Table 3. The functions obtained in this analysis produced significant discrimination of the four groups for two of the three discriminant functions. The first function defined by group rivalry (r = .59), negative mental models (r = .55), strong group boundaries (r = .40), and group exclusivity (r = .35) was labeled oppositional bonding. Violent groups, both ideological (M = 1.03) and nonideological (M = 2.58), received higher scores on this dimension than did nonviolent groups, both ideological (M = -1.79) and nonideological (M = -1.82). Apparently, “strong” groups that disparage other groups give rise to violence. It appears, however, that certain unique characteristics of ideological groups may make them especially prone to violence. The second function obtained in this analysis—defined by group feelings of superiority (r = .68), strong group values (r = .56), victimization (r = .53), strong group affect (r = .40), group sacrifice (r = .32), and symbolic commitments (r = .29)—was labeled ideological righteousness. This sense of ideological righteousness characterizes violent ideological groups (M = 1.60), but not violent nonideological groups (M = -1.04), nonviolent ideological groups (M = 0.21), or nonviolent non-ideological groups (M = -0.78). Group means as well as their respective comparisons to the other group means can also be seen in Table 4. Table 3 presents the results obtained in the discriminant analysis examining the organizational predictors. The three resulting functions were found to produce significant discrimination of the four groups for all three of the discriminant functions. The first function obtained in this analysis, labeled violence as control, is defined by denigration of external institutions (r = .50), use of violence as a control mechanism (r = .48), recruitment by investment 1544 MUMFORD ET AL. Table 4 Tukey’s HSD Cell Mean Comparisons for Leadership, Group, Organization, and Environment Level Violent Leadership level Social concern Ideological extremism Group level Oppositional bonding Ideological righteousness Organization level Violence as control Ideological indoctrination Organizational framing Environment level Social conflict Social disruption Nonviolent Ideological Nonideological Ideological Nonideological -0.65b 2.47c -3.05a -1.27a 1.76c -0.42b 1.94c -0.78ab 1.03b 2.58a -1.79c -1.82c 1.60c -1.04a 0.21b -0.78a 2.31a 1.78c 1.86a -1.97a -1.43b 0.02b -2.73c 0.16b 0.15b 0.20b -1.29a 0.94c 1.17a 0.75b -0.06b -0.48a 0.35b -0.72a -1.46c 0.45b Note. HSD = honestly significant difference. Means that do not share a subscript differ significantly at p < .05. (r = .45), clan control (r = .45), punishment as control (r = .39), isolation of members (r = .36), and external conflict (r = .30). As might be expected, violent groups, both ideological (M = 2.31) and nonideological (M = 1.86), produced higher scores on this dimension than did nonviolent groups, both ideological (M = -1.43) and nonideological (M = -2.73). With respect to organizational-level variables, violent ideological groups differed from other groups with respect to systematic attempts to inculcate a new extremist mental model. Thus, the ideological indoctrination dimension VIOLENCE AND IDEOLOGY 1545 defined by sense breaking (r = .42), sacrifice for the organization (r = .33), sense making (r = .30), value-based communication (r = .26), and training in ideology (r = .24) produced high scores for violent ideological groups (M = 1.78), but not violent nonideological groups (M = -1.97), nonviolent ideological groups (M = 0.02), or nonviolent nonideological groups (M = 0.16). The third and final function obtained in this discriminant analysis was rather complex. Training in ideology (r = .41) and isolation of members (r = .29) produced positive loadings, while value-based communication (r = -.26) and denigration of external institutions (r = -.22) produced negative loadings. Because inspection of the pattern matrix indicates that limited clan control and limited idolization of leadership were also linked to scores on this dimension, it seems plausible to argue that this dimension reflects an organizational or institutional framing of issues, as opposed to a leaderbased framing. Nonviolent, nonideological groups (M = 0.94) obtained higher scores on the organizational framing dimension than did nonviolent ideological groups (M = -1.29), violent ideological groups (M = 0.15), and violent non-ideological groups (M = 0.20). Cell means and relative comparisons to other cells are presented in Table 4. The results that were obtained when the environmental-level variables were used to discriminate these groups can be seen in Table 3. The significant discrimination among all three functions in this analysis indicates that environmental conditions did shape the emergence of these groups. More specifically, in accordance with the observations of Moghaddam (2005) and Staub (2004), social conflict appears to give rise to ideological groups, especially violent ideological groups. Accordingly, the social conflict dimension, defined by the presence of multiple ideological groups (r = .62), fragmentation in society (r = .54), rivalry (r = .53), social conflict (r = .47), fear of social loss (r = .43), threats to tradition (r = .41) and economic displacement (r = .40) was associated with high scores for violent ideological groups (M = 1.17), but not for violent nonideological groups (M = -0.06), nonviolent ideological groups (M = 0.35), and nonviolent nonideological groups (M = -1.46). In addition to social conflict, however, social disruption also appears to be linked to the emergence of violent ideological groups. Social disruption, as reflected in fear of social loss (r = .32), social conflict (r = .30), loss of social pattern (r = .28), fragmentation (r = .23), and middle-class marginalization (r = .22), as opposed to economic disruption or inequitable distribution of resources (r = -.38), was associated with the emergence of violent ideological groups (M = 0.75), but not nonviolent ideological groups (M = -0.72) or violent nonideological groups (M = -0.48). The tendency of nonviolent, nonideological groups to emerge under these conditions (M = 0.45) may be related to the role of ideology in reducing uncertainty. 1546 MUMFORD ET AL. Regression Analyses Table 5 presents the results that were obtained when the various violence criteria were regressed on the discriminant function scores. Across criteria, the origins of the group in social interaction (i.e., a control variable) was found to be negatively related to the various violence criteria (β = −.36). When discriminant function scores were added to social groups, along with the other controls that were significantly related to a particular violence criterion, it was found that the function scores resulted in significant ( p ⱕ .01) gains in production for all of the violence criteria under consideration. With regard to the amount and severity of violence, it was found that social concern on the part of leaders tended to inhibit violence (b = -.37), while institutional sanctioning of violence, as reflected in organizational use of violence as a control, tended to contribute to violence (b = .34). It was also found that the social conflict in the environment was positively related to the amount of violence (b = .21) observed in these groups. Social conflict and social disruption, conditions giving rise to ideological groups, were also found to be related to group violence (b = .21) and cultural violence (b = .31). Moreover, ideological extremism (b = .42), along with oppositional bonding (b = .44) and organizational framing (b = -.29), were found to be related to institutional violence. With regard to the ideological criteria, a somewhat different pattern of findings emerged. In considering the various controls across criteria, it was found that the nature of the group—political (β = .31) or social (β = .34 )—was positively related to criteria such as initiation of mass movements, changes in society, changes in institutions, and positive contributions made. Apparently, social and political groups are especially likely to effect social outcomes. These results can be seen in Table 5. Even when these controls were taken into account, however, the discriminant functions were found to be effective predictors of three of the five ideological criteria. With regard to recruitment, it was found that using violence as a control (b = .43) was positively related to recruitment effectiveness, while ideological righteousness (b = -.48) apparently inhibited effective recruitment. The ability of ideological groups to induce changes in institutions, however, was negatively related to the use of violence as a control (b = -.57), as well as social conflict (b = -.27), and social disruption (b = -.24). Ideological extremism, on the other hand, was positively related (b = .37) to institutional changes. Finally, the number of positive contributions made by the group was positively related to leader social concern (b = .29), but negatively related to group oppositional bonding (b = -.38) and ideological indoctrination (b = -.26). Apparently, using violence as a control Table 5 Results of Regression Analyses Examining Violence Criteria p .34 .002 Severity of violence .35 .002 Group violence — — Violence criteria Amount of violence R p Rc2 pc Social group (b = .-.34) .91 .001 .72 .001 Social group (b = -.35) .84 .001 .59 .001 — .75 .001 .56 .001 Significant discriminant functions ( p ⱕ .10) 1547 Social concern (b = -.39) Violence as control (b = .33) Social conflict (b = .21) Organizational framing (b = .13) Social concern (b = -.35) Violence as control (b = .35) Social concern (b = -.48) Social conflict (b = .27) VIOLENCE AND IDEOLOGY R Significant controls ( p ⱕ .10) R p Institutional violence .38 .005 Cultural violence .33 .009 Ideological criteria Recruitment effectiveness — — .70 .001 Initiation of mass movement Significant controls ( p ⱕ .10) R p Rc2 pc Social group (b = -.33) Business group (b = -.32) .72 .001 .37 .001 Biographer from country (b = -.21) Military group (b = .23) .71 .001 .40 .001 — .52 .029 Political group (b = .43) Industrialized country (b = .40) Social group (b = .35) .73 .001 .05 .659 Significant discriminant functions ( p ⱕ .10) Ideological extremism (b = .42) Oppositional bonding (b = .44) Organizational framing (b = -.29) Social conflict (b = .22) Ideological righteousness (b = -.48) Violence as a control (b = .43) — 1548 MUMFORD ET AL. Table 5 Continued Changes in institutions .35 .02 Social group (b = .31) .001 .32 .001 .59 .008 .13 .271 .84 .001 .58 .001 Political group (b = .18) Changes in society .47 .001 Number of positive contributions .36 .001 Political group (b = .29) Business group (b = -.12) Biographer from country (b = -.19) Amount of criterion information (b = .26) Social group (b = .35) Ideological extremism (b = .37) Violence as control (b = -.57) Social conflict (b = -.27) Social disruption (b = -.24) — Note. R = multiple correlation; p = significance level; Rc2 = change in variance accounted for; pc = significance of change. 1549 Social concern (b = .29) Oppositional bonding (b = -.38) Ideological indoctrination (b = -.26) VIOLENCE AND IDEOLOGY .67 1550 MUMFORD ET AL. is useful for attracting new members, but limits the ability of the group to achieve certain outcomes. Moreover, it appears that conflict and disruption in the environment may inhibit change, while a strong commitment to an extreme ideology helps to bring about change, at least in some forms. Discussion Before turning to the broader conclusions flowing from the present study, certain limitations should be noted. To begin with, the present study was intended to contrast violent ideological groups with other relevant comparison groups. Although this kind of design is useful in determining the unique characteristics of these groups, it is not a design that makes it possible to draw conclusions about the natural rate at which groups falling into these categories emerge in a society (Strange & Mumford, 2005). Similarly, the design and sampling of the study produced cell sizes that precluded withingroup analyses. Thus, it should be noted that future studies focusing on specific groups (e.g., violent, nonideological groups) may be necessary to gain a full understanding of the mechanisms operating within those unique groups. Along related lines, our intention in the present study was to identify the dimensions, or attributes, that distinguish violent ideological groups from other relevant comparison groups. Accordingly, we examined a number of potential predictors; predictors operating at different levels of analysis and reflecting different theoretical models concerning the sources of ideological violence (e.g., Crayton, 1983; Moghaddam, 2005; Staub, 2003, 2004). Nonetheless, it seems likely that some potential markers of ideological violence exist that were not examined in the present study. Finally, these predictors were derived from a content analysis of groups that had been subject to prior qualitative analysis. The number of groups examined was similar to that applied in prior studies involving a quantitative analysis of qualitative data (e.g., O’Connor et al., 1995). However, it is also true that the groups for which requisite qualitative data were available represent historically noteworthy, prototypical exemplars of a given type of group. Thus, some caution is called for in extending our findings to less extreme groups. It should also be noted that the use of these extreme groups may have resulted in some form of range restriction among a few of the criteria examined. Such range restriction, however, is likely to have resulted in more conservative, rather than inflated estimates (Greer, Dunlap, Hunter, & Berman, 2006). Nonetheless, this is a notable study limitation. Even bearing these limitations in mind, we believe that the results obtained in the present study do lead to some noteworthy conclusions about VIOLENCE AND IDEOLOGY 1551 the origins of violent ideological groups and the consequences of violent ideology. Most current theories of ideological violence stress the multilevel nature of the phenomenon (e.g., Moghaddam, 2005; Post et al., 2002). In fact, the results obtained in the discriminant analysis indicate that variables operating at the leadership, group, organizational, and environmental level all contribute to ideological violence on the part of groups. Most theories examining the environmental conditions giving rise to ideological violence stress the importance of social disruption and social conflict. Social disruption, of course, obviates extant mental models while promoting the development of new, potentially violent ideologies based on the apparent failure of past models (Strange & Mumford, 2005). Social conflict involves the threat held to give rise to violence (Cordes, 2001). The results obtained in the present study indicate that not only are violent ideological groups likely to emerge under conditions of social conflict and social disruption, but the amounts of social conflict and social disruption evident in the group’s environment are relatively powerful predictors of violence, even when relevant controls are taken into account. Moreover, the regression results indicate that social conflict may serve to inhibit the inducement of change: change that may be necessary to alleviate some of the tension building in these types of environments. This, in turn, may fuel growing resentment and push individuals into the extreme actions associated with violent ideology. Although these findings with regard to the environmental conditions are of some importance, the question remains as to whether certain unique characteristics of groups, their mode of organization, and their leadership act to promote the acquisition and dissemination of violent ideologies. Consistent with the argument that ideology involves the creation and dissemination of shared mental models, the organizational-level analysis produced an ideological indoctrination dimension defined by sense breaking and sense making (Pratt, 2000). Violent ideological groups were apparently more likely to engage in this indoctrination than were other groups. However, the results obtained in the regression analysis indicate that the sense breaking and sense making associated with indoctrination did not necessarily lead to violence unless institutional sanctioning of violence occurred as reflected in the use of violence as a control mechanism. These findings seem to be consistent with the results obtained for the group and leadership predictors. Violent ideological groups, in comparison with other groups, were characterized by an expression of ideological righteousness at the group level, and expression of ideological extremism on the part of the leaders. Ideological righteousness, of course, through victimization and a sense of superiority, acts as a potential justification mechanism for violence (Moghaddam, 2005). Ideological righteousness may, moreover, 1552 MUMFORD ET AL. provide a logic justifying adoption of a new, potentially violent mental model being advocated by extremist leaders. Ideological righteousness, coupled with indoctrination or sense breaking, causes people to be willing to comply with institutional policies sanctioning acts of violence: policies that may arise as part and parcel of the extremist positions commonly advocated by the leaders of violent ideological groups. Taken as a whole, it appears that violent ideological groups are characterized by a unique syndrome of characteristics. More specifically, these groups arise under conditions of social conflict and social disruption, with violence emerging from institutional policies; potentially policies linked to extremism. People’s willingness to execute these policies, however, depends on both indoctrination and creation of a sense of righteousness. This syndrome of characteristics giving rise to ideological violence, moreover, is distinct from the syndrome of characteristics that were evidenced by violent non-ideological groups. Violent nonideological groups were characterized by a lack of social concern and oppositional bonding, rather than ideological extremism, ideological righteousness, and ideological indoctrination. In fact, the only attribute that these violent ideological and violent nonideological groups shared was institutional sanctioning of violence through the use of violence as a control mechanism. Indeed, social conflict and social disruption did not seem to be especially likely to give rise to violent nonideological groups. Thus, ideological violence may represent a distinct phenomenon from group violence in general. Along similar lines is the finding that violent ideological groups apparently did not share a great deal in common with nonviolent ideological groups, again illustrating the unique nature of violent ideological groups. It seems that nonviolent ideological groups arise from attempts to replace failed institutions stressing the social value of the institution being built through symbolism and organizational framing. These results are consistent with Moghaddam’s (2005) argument that ideology does not necessarily lead to violence. It should be noted, however, that although violent ideological and nonviolent ideological groups were differentiated by a unique set of characteristics, the present study illustrated an important lack of distinction among groups; namely, between ideological groups and nonideological groups broadly. Based on the pattern of group means, ideological and nonideological groups did not appear to distinguish themselves substantially from one another. This point highlights the importance of examining ideology and violence in combination when attempting to research and understand extreme violence. These findings and the other findings discussed previously are of some importance for practical as well as theoretical reasons. At a practical level, they suggest that it may not be desirable to apply models developed to account for criminal activity in attempts to understand violent ideological VIOLENCE AND IDEOLOGY 1553 groups, such as those involved in terrorism. In point of fact, applying such inappropriate models may result in misguided efforts to limit the violence and actions of criminal groups. The results also bring to the fore important theoretical questions regarding current conceptualizations of ideological violence. Specifically, Moghaddam’s (2005) theoretical metaphor of an ever-narrowing staircase contends that as individuals proceed up the pathway, their options become fewer until a select few ultimately choose some form of ideological violence. Thus, in applying this metaphor to the current study, a natural conclusion may be that ideological violence resides at the top of the staircase, while nonideological violence resides along lower portions of the staircase. The results of the present effort, however, may be taken to indicate that violent ideological groups should not be viewed as the final stage of a continuum, but rather as a unique and distinct entity. This is an entity distinct even from those who share strong ideologies. Although the design and nature of the present effort makes such a contention speculative, nonetheless it appears to be noteworthy. Clearly, such theoretical investigation stands as an important and necessary avenue for future research. The findings obtained in the present study also bring to the fore theoretical issues related to how righteousness (i.e., sense of group superiority), indoctrination, and sense breaking, vis-à-vis leader extremism, make possible the conditions for violence on the part of ideological groups. Put more directly, we need studies examining mediators and moderators of ideological violence, especially at the level of the leader, the group, and the organization. In sum, the results of the present research suggest that violent ideological groups are characterized by a unique syndrome of characteristics. 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