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Identity fusion

Identity fusion, a psychological construct rooted in social psychology and cognitive anthropology, is a form of alignment with groups in which members experience a visceral sense of oneness with the group. The construct relies on a distinction between the personal self (characteristics that make someone a unique person, such as height, age, or personality) and the social self (characteristics that align the person with various groups, such as common nationalities, interests, or motivations). As the name suggests, identity fusion involves the union of the personal and social selves. When fusion occurs, both the personal and social selves remain salient and influential but the boundaries between them become highly permeable. In addition, the theory proposes that fused persons come to regard other group members as "family" and develop strong relational ties to them as well as ties to the collective. Therefore, fused persons are not just bound to the collective; they are tied to the individual members of the collective.

The potency of the personal self and relational ties distinguish identity fusion from other forms of alignment with groups, such as "group identification", in which allegiance to the collective eclipses the personal self and relational ties to other group members. Because of this, the personal self and relational ties are not as involved in theories of group identification. Identity fusion theorizes that fusion measures should be more predictive of extreme pro-group behavior than previously proposed measures of identification. In fact, there is growing evidence of this. Measures of identity fusion are particularly powerful predictors of personally costly pro-group behaviors, including endorsement of extreme behaviors, such as fighting and dying for the group.[1][2][3][4][5][6][7][8][9][10][11]

Consequences[edit]

Endorsement of extreme pro-group behaviors[edit]

Since the experimental study of actual extreme pro-group acts raises large ethical red flags, researchers have largely focused on endorsements of extreme pro-group acts. Several studies have shown that fusion is a robust predictor of willingness to fight and die on behalf of one's group.[3][17][5][6] Other research has examined responses to variations of the trolley dilemma adapted for groups. In scenarios that pitted the desire for self-preservation against self-sacrifice for others, strongly fused persons were especially willing to endorse sacrificing their lives for fellow in-group members (but not for out-group members).[2] Using a different approach, researchers examined group members' reactions to significant group losses and found that highly identified individuals tend to detach themselves from the group following a group failure, whereas strongly fused persons predicted that they would "go down with the ship". For example, in parallel studies of the 2008 presidential elections in Spain and the United States, people who were strongly fused with their political party internalized both victory and defeat, but highly identified persons internalized only victory.[22] Additional field research with terrorist groups like ISIS[23][24][25] and rebel groups[7][26] is also beginning to shed light on the role identity fusion plays in extreme pro-group behaviors.[27]

Engagement in personally costly, pro-group behaviors[edit]

In addition to predicting endorsement of extreme pro-group behaviors, research suggests that fusion is a predictor of a variety of personally costly pro-group behaviors in the real world.[28]


Additional research has shown that fusion could also be a strong predictor of group-directed helping behaviors. In some studies, individuals donated money to the group.[17] In others, they provided social and emotional support to fellow group members.[29] Other research has also suggested that strongly fused individuals are especially willing to go out of their way to protect the group and maintain its integrity. For instance, strongly fused employees were more likely to report having "blown the whistle" sometime during their employment. Presumably, such whistle-blowing activity was motivated by a conviction that their actions would ultimately benefit the group.[30] Another study found that students who were strongly fused with their university were willing to whistle-blow against a cheating fellow student despite the cost of time, energy, and the possibility of retaliation from the cheater.[31]

Local versus extended fusion[edit]

Since Charles Darwin, the willingness of some humans to sacrifice themselves for genetically unrelated members of the same large, diffuse group (such as a religion or a nation) has raised a theoretical challenge. Social psychological perspectives have contended that such sacrifices are motivated by commitment to the larger collective[12] whereas anthropological perspectives have contended that such sacrifices are triggered by commitment to other members of the group.[32][33] The distinction between local and extended fusion provides an explanation for these apparently competing explanations. Local fusion is proposed to occur in relatively small, homogeneous groups whose members attach to each other through direct personal contact (e.g., families or work teams). In contrast, extended fusion occurs in relatively large groups whose members do not all have personal relationships (e.g., political parties or nation states). In extended fusion, even though fused individuals may not actually know all of their fellow group members, they still feel like they know them and even think of them as like family.[4][34][35]


In short, identity fusion theory posits that fused people project feelings of relational ties they have with known group members onto unknown group members. The projection of relational ties explains why fused individuals are sometimes willing to make sacrifices for members of large heterogeneous groups that most people would make only for small, tight-knit groups. Through the process of projection, they psychologically transform genetically unrelated individuals into kin.[4]

Mechanisms[edit]

Shared essence[edit]

Although most fusion research to date has focused on the nature and consequences of fusion, recent research has revealed some starting points for understanding the causes of fusion.[4][5] Perceptions of shared essence, the belief that one shares essential core qualities with the group, appears to be a key building block of identity fusion. Perceptions of shared essence arise in different ways in local and extended fusion. In local fusion, individuals have direct experiences with other group members that foster the conclusion that they share essential qualities with those individuals. In extended fusion, the perception of psychological kinship is fostered by the presence of certain characteristics that are perceived as fundamental to who the person is. For example, people are more likely to fuse with large extended groups when they become convinced that members of the group share with them genes or core values, especially if they hold those values sacred.[36]

Invulnerability[edit]

The relational ties principle of fusion suggests that highly fused individuals will feel that they and other group members synergistically strengthen each other. This perception of reciprocal strength should foster the perception that together, members of the group are uniquely invulnerable. These feelings of invulnerability may serve to insulate strongly fused individuals from fully recognizing the risks associated with extreme acts. Perceptions of invulnerability have been shown to mediate the effects of fusion on endorsement of pro-group behavior.[3][10][37]

Agency[edit]

The identity synergy principle of fusion assumes that the borders between the personal and social selves are highly permeable for strongly fused individuals. These porous borders encourage people to channel their personal agency into group behavior, raising the possibility that strongly fused individuals will channel their feelings of personal agency into pro-group behavior. Perceptions of agency have been shown to mediate the effect of fusion on pro-group behavior.[17][3]

Shared experience[edit]

A study found that groups that share painful or strong negative experiences can cause visceral bonding, and pro-group behavior.[38]

Psychology of self

Self-categorization theory

The True Believer