Introduction: Olson's problem -- Part I: Philosophy -- The prisoners' dilemma -- Voting and other thresholds -- Negligibility -- Conclusion to part I -- Part II: History -- Rule and act-utilitarianism -- Perfect competition, oligopoly, and monopoly -- Conclusion to part II

This paper addresses the question of whether our evolutionary history suggests that humans are likely to be individually selected selfish maximizers or group selected altruists. It surveys models from the literature of evolutionary biology in which groups are formed and dissolved and where the...