Until recently, theorists considering the evolution of human cooperation have paid little attention to institutional … punishment, a defining feature of large-scale human societies. Compared to individually-administered punishment, institutional … punishment offers a unique potential advantage: the ability to control how quickly legal rules of punishment evolve relative to …

cooperation is shaped by the way information about risk is presented (from description or from experience) and by differences in … lotteries with equivalent levels of risk. Cooperation rates in games vary with different levels of risk across decision … stochastic social dilemmas than in the lotteries. The findings highlight how an uncertain environment shapes cooperation and call …

higher the levels of cooperation. We compare the behavior from these in finitely repeated games with behavior from finitely … repeated games of the same expected length and we find that there is more cooperation in the in finitely repeated games …

observe surprisingly high levels of cooperation and altruism within groups in conflict situations such as civil wars. We …

groups but where entrepreneurs have a desire for cooperation and peace. We assert that it is members of the elites who start …