"Traditionally, game theory has been seen as a theory of how rational actors behave. Ironically, game theory... has shown... the limited capacity of the concept of rationality alone to predict human behavior. ...Evolutionary game theory deploys the Darwinian notion that good strategies diffuse across populations of players rather than being learned by rational agents. ...[A]gents choose best responses, and otherwise behave as good citizens of game theory society. But they may be pigs, dung beetles, birds, spiders, or even... s and s. How do they accomplish these feats with their small minds and alien mentalities? ...the agent is displaced by the strategy as the dynamic game-theoretic unit. ...[W]e provide agent-based computer simulations of games, showing that really stupid critters can evolve toward the solution of games previously thought to require "rationality" and high-level information processing capacity."