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Cooperation and Conflict in the Prisoner's Dilemma and the Emergence of Norms

Cooperation and Conflict in the Prisoner's Dilemma and the Emergence of Norms

This video was recorded at International Workshop on Coping with Crises in Complex Socio-Economic Systems. According to Thomas Hobbes' Leviathan, "the life of man [is] solitary, poor, nasty, brutish, and short", and it would need powerful social institutions to establish social order. In reality, however, social cooperation can also arise spontaneously, based on local interactions rather than centralized control. The self-organization of cooperative behavior is particularly puzzling for social dilemmas related to sharing natural resources or creating common goods. Such situations are often described by the prisoner's dilemma. Here, we report the sudden outbreak of predominant cooperation in a noisy world dominated by selfishness and defection, when individuals imitate superior strategies and show success driven migration. In our model, individuals are unrelated, and do not inherit behavioral traits. They defect or cooperate selfishly when the opportunity arises, and they do not know how often they will interact or have interacted with someone else. Moreover, our individuals have no reputation mechanism to form friendship networks, nor do they have the option of voluntary interaction or costly punishment. Therefore, the outbreak of prevailing cooperation, when directed motion is integrated in a game-theoretical model, is remarkable, particularly when random strategy mutations and random relocations challenge the formation and survival of cooperation clusters. Finally, new results will be presented on the issue of conflict in the prisoner's dilemma and on the emergence of norms, when group dynamical effects are taken into account.

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