Preface; Part I. Individual Differences in Social Dilemmas: 1. From generosity to aggression: five interpersonal orientations relevant to social dilemmas Paul A. M. Van Lange; 2. Effects of risk preferences in social dilemmas: a game theoretical analysis and evidence from two experiments Marcel Van Assen and Chris Snijders; 3. Risk preference as a predictor of cooperation in a social dilemma Craig D. Parks; 4. Measurements and effects of social value orientation in social dilemmas: a review Winton Tung Au and Jessica Y. Y. Kwong; 5. Are people in a collective society truly cooperative? The interaction of social orientation and the fate of matrix-society: a simulation study Toshiaki Doi; Part II. Dynamical Aspects of Social Dilemmas: 6. The dynamics of trust and trustworthiness in large groups: a computer simulation Peter de Heus and David M. Messick; 7. Stylized solutions for environmental dilemmas in a cellular world Andreas Flache; 8. Freedom of movement: a strategic analysis of social dilemmas with the option to move Marcello Gallucci, Paul A. M. Van Lange and Jaap W. Ouwerkerk; 9. The emergence of tit for tat strategies Ilan Fischer and Ramzi Suleiman; Part III. Social Dilemmas in Inter-group Conflicts: 10. Cooperation in intergroup social dilemmas Gary Bornstein; 11. Do democracies breed chickens? Gary Bornstein, Arthur Schram and Joep Sonnemans; 12. Ingroup cooperation and the social exchange heuristic Toko Kiyonari and Toshio Yamagishi; 13. Leadership in intergroup social dilemmas: accountability, partnership and the public good Sherry K. Schneider, Margaret Foddy and Lenka Bilik; Part IV. Uncertainty and Cooperation in Social Dilemmas: 14. What we know (and do not know) about the effects of uncertainty on behavior in social dilemmas Eric Van Dijk, Arjaan Wit, Henk Wilke and David V. Budescu; 15. Explaining apparent altruism in terms of egoistic incentives: not so fast, please Robyn M. Dawes; 16. Dependence and cooperation in fuzzy dilemmas: the effects of environmental and endowment uncertainty Thomas R. Boone and Michael W. Macy; 17. Asymmetrical access to information in social dilemmas with resource uncertainty Mathias Gustafsson, Daniel Eek and Tomy Gärling; 18. The interplay between environmental and social uncertainty in social dilemmas Arjaan Wit, Eric Van Dijk, Henk Wilke and Arieneke Groenenboom.