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Spoils division rules shape aggression between natural groups.

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Asymmetric benefit sharing in conflicts incentivizes offensive aggression among privileged groups. Unequal spoils drive privileged individuals to initiate conflict, while disadvantaged groups adopt defensive strategies.

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Area of Science:

  • Social Sciences
  • Behavioral Economics
  • Conflict Studies

Background:

  • Violent intergroup conflicts are recurrent throughout history, posing significant harm.
  • Participation in conflict presents a collective action problem due to individual risks and costs versus group benefits.

Purpose of the Study:

  • To investigate the role of asymmetric benefit division in motivating offensive intergroup aggression.
  • To test the hypothesis that unequal spoils encourage initiating conflict, even at the group's expense.

Main Methods:

  • A contest experiment was conducted among three Ethiopian societies with varying intergroup relations (peaceful/violent).
  • The study manipulated the sharing of benefits among victors to create equal versus unequal division scenarios.

Main Results:

  • Under equal sharing, participants increased contributions to intergroup hostility.
  • Unequal sharing led privileged participants to adopt offensive strategies, while disadvantaged participants chose defensive ones, irrespective of prior group relations.

Conclusions:

  • Asymmetric benefit division is a key factor promoting offensive intergroup aggression.
  • The findings highlight how inequality in spoils can drive conflict initiation and shape group strategies.