Models of collective action rarely account for differences across individuals beyond a limited set of strategies, ignoring variation in condition, motivation and personality. However, emerging evidence from the field of animal behavior indicates that these differences may have significant implications for the dynamics of collective action. For example, inter-individual differences within groups can generate leader-follower relationships that are integral to successful collective action. This research has only recently been extended to humans and non-human primates and has yet to be united into a single explanatory framework. This symposium aims to capture the breadth of inter-individual differences as they relate to collective action in humans and non-human primates. We bring together researchers studying diverse primate species and small-scale societies to present data on inter-individual differences in collective action. This symposium will 1) delineate similarities and differences in collective action across primates; 2) identify how inter-individual differences contribute to inter-specific differences in collective action; 3) explore how these data fit within the existing body of work on collective action; 4) and discuss how systematic cross-cultural and cross-specific comparisons might be made for future research.
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Discussion: Lee Cronk
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1
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Simultaneous tracking of wild baboons reveals individual and social drivers of troop organization. Margaret C. Crofoot, Ariana Strandburg-Peshkin, Damien Farine.
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2
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Social and ecological factors mediating female participation in collective action in black howler monkeys (Alouatta pigra). Sarie Van Belle.
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3
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Energy balance and stress responses correspond with individual participation by redtail monkeys in aggressive intergroup interactions. Michelle Brown, Melissa E. Thompson.
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4
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Inter-individual variation in communal hunting in three wild chimpanzee communities. Ian C. Gilby, Zarin P. Machanda, Deus C. Mjungu, Martin N. Muller, Anne E. Pusey, Richard W. Wrangham.
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5
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Individual contributions to pooled energy budgets: the Tsimane case. Paul L. Hooper, Hillard S. Kaplan.
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6
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Interdependence, Risk-Pooling, and Environmental Change in Arctic Subsistence Economies: Ethnographic and Experimental Evidence. Drew Gerkey.
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7
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Leadership and collective action in the HRAF probability sample. Zachary H. Garfield, Edward H. Hagen.
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8
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Optimal foraging and ephemeral group formation of two societies on the boundary of theory. Kathryn Demps, Susan Glover Klemetti.
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9
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The Effects of Key Individuals on Collective Action. Katherine McAuliffe, Richard Wrangham, Luke Glowaki, Andrew F. Russell.
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10
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Leadership in an egalitarian human society. Chris R. von Rueden, Michael Gurven, Hillard Kaplan, Jonathan Stieglitz.
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11
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Differences between leaders and non-leaders in small-scale warfare and implications for collective action. Luke Glowacki.
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