One of the main goals of terrorism is to instill fear in a targeted populace. We investigate how information precision about rare, but highly devastating terrorist attacks influences psychological resilience, which we operationalize as the ability to continue to take optimum risks. First, we...

Hammond and Axelrod use an evolutionary agent-based model to explore the development of ethnocentrism. They argue that local interactions permit groups, relying on in-group favoritism, to overcome the Nash equilibrium of the prisoner’s dilemma and sustain in-group cooperation. This...