Philosophical Studies

, Volume 133, Issue 1, pp 95–109 | Cite as

Group intentions as equilibria

  • Sara Rachel Chant
  • Zachary Ernst
Original Paper


In this paper, we offer an analysis of ‘group intentions.’ On our proposal, group intentions should be understood as a state of equilibrium among the beliefs of the members of a group. Although the discussion in this paper is non-technical, the equilibrium concept is drawn from the formal theory of interactive epistemology due to Robert Aumann. The goal of this paper is to provide an analysis of group intentions that is informed by important work in economics and formal epistemology.


Group intention Collective action  Action theory  Interactive epistemology 


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We would like to thank Dennis Stampe, Martha Gibson, Alan Sidelle, Berent Enç, Al Mele, as well as a special thanks to the participants and organizers of the Bellingham Summer Philosophy Conference 2005, especially Hud Hudson and Ned Markosian.


  1. Aumann, R. J. (1999a). Interactive epistemology I: Knowledge. International Journal of Game Theory, 28, 263–300.CrossRefGoogle Scholar
  2. Aumann, R. J. (1999b). Interactive epistemology II: Probability. International Journal of Game Theory, 28, 301–314.CrossRefGoogle Scholar
  3. Axelrod, R. (1984). The evolution of cooperation. New York: Basic Books.Google Scholar
  4. Binmore, K. (1989). Social contract I: Harsanyi and Rawls. The Economic Journal, 99, 84–102.CrossRefGoogle Scholar
  5. Binmore, K. (1994). Playing fair. Cambridge, Massachusetts: MIT Press.Google Scholar
  6. Binmore, K. (1998). Just playing. Cambridge, Massachusetts: MIT Press.Google Scholar
  7. Binmore, K., & Samuelson, L. (2001). Coordinated action in the electronic mail game. Games and Economic Behavior, 35, 6–30.CrossRefGoogle Scholar
  8. Bratman, M. E. (1992). Shared cooperative activity. The Philosophical Review, 101(2), 327–341.CrossRefGoogle Scholar
  9. Bratman, M. E. (1993). Shared intention. Ethics 104, 97–113.CrossRefGoogle Scholar
  10. Chant, S. R. (2005). The special composition question in action. Pacific Philosophical Quarterly, Forthcoming.Google Scholar
  11. Elster, J. (1989). The cement of society: A study of social order. Cambridge and New York: Cambridge University Press.Google Scholar
  12. Feinberg, J. (1991). Collective responsibility. In L. May & S. Hoffman (Eds.), Collective responsibility: Five decades of debate in theoretical and applied ethics (pp. 53–76). Rowman and Littlefield Publishers, Inc.Google Scholar
  13. Gauthier, D., & Sugden, R. (Eds.) (1993). Rationality, justice, and the social contract: Themes from morals by agreement. Ann Arbor: University of Michigan Press.Google Scholar
  14. Harsanyi, J. (1953). Cardinal utility in welfare economics and in the theory of risk-taking. Journal of Political Economy, 61, 434–435.CrossRefGoogle Scholar
  15. Harsanyi, J. (1975). Can the maximin principle serve as a basis for morality? A critique of John Rawls’ theory. American Political Science Review 69, 594–606.CrossRefGoogle Scholar
  16. Harsanyi, J. (1985). Does reason tell us what moral code to follow and, indeed, to follow any moral code at all? Ethics, 96, 42–55.CrossRefGoogle Scholar
  17. Hume, D. (1739). A treatise on human nature. Oxford: Clarendon Press.Google Scholar
  18. Lewis, D. (1969). Convention: A philosophical study. Cambridge: Harvard University Press.Google Scholar
  19. Nash, J. (1950). The bargaining problem. Econometrica, 18, 155–162.CrossRefGoogle Scholar
  20. Nash, J. (1951). Non-cooperative games. Annals of Mathematics, 54(2), 286–295.CrossRefGoogle Scholar
  21. Rubinstein, A. (1989). The electronic mail game: Strategic behavior under “Almost common knowledge”. American Economic Review, 79, 385–391.Google Scholar
  22. Samuelson, L. (1997). Evolutionary games and equilibrium selection. Cambridge, Massachusetts: The MIT Press.Google Scholar
  23. Searle, J. (1990). Collective intentions and actions. In P. R. Cohen & J. Morgan (Eds.), Intentions in communication (pp. 401–416). MIT Press.Google Scholar
  24. Searle, J. (1995). The construction of social reality. New York: The Free Press.Google Scholar
  25. Searle, J. (1997). Responses to critics. Philosophy and Phenomenological Research, 57(2), 449–458.CrossRefGoogle Scholar
  26. Skyrms, B. (1994a). Darwin meets the logic of decision: Correlation in evolutionary game theory. Philosophy of Science, 61, 503–528.Google Scholar
  27. Skyrms, B. (1994b). Sex and justice. The Journal of Philosophy, 91, 305–320.CrossRefGoogle Scholar
  28. Skyrms, B. (1996). Evolution of the social contract. Cambridge and New York: Cambridge University Press.Google Scholar
  29. Skyrms, B. (1997). Chaos and the explanatory significance of equilibrium: Strange attractors in evolutionary game dynamics. In C. Bicchieri, R. Jeffrey, & B. Skyrms (Eds.), The dynamics of norms (pp. 199–220). New York: Cambridge University Press.Google Scholar
  30. Skyrms, B. (1999). Reply to critics. Philosophy and Phenomenological Research, 59(1), 243–254.CrossRefGoogle Scholar
  31. Skyrms, B. (2004). The stag hunt and the evolution of social structure. Cambridge: Cambridge University Press.Google Scholar
  32. Sober, E., & Wilson, D. S. (1994). Reintroducing group selection to the human behavioral sciences. Behavioral and Brain Sciences, 17, 585–654.CrossRefGoogle Scholar
  33. Sober, E., & Wilson, D. S. (1998). Unto others. Cambridge, Massachusetts: Harvard University Press.Google Scholar
  34. Tuomela, R. (1984). A theory of social action. Dordrecht: D. Reidel Publishing Company.Google Scholar
  35. Tuomela, R. (1989). Actions by collectives. Philosophical Perspectives, 3, 471–496CrossRefGoogle Scholar
  36. Tuomela, R. (1991). We will do it: An analysis of group-intentions. Philosophy and Phenomenological Research, 51(2), 249–277.CrossRefGoogle Scholar
  37. Tuomela, R. (2002). The philosophy of social practices: A collective acceptance view. Cambridge: Cambridge University Press.Google Scholar
  38. Tuomela, R. (2004). Joint action. Workshop on Holistic Epistemology and Theory of ActionGoogle Scholar
  39. Tuomela, R. (2005). We-intentions revisited. Philosophical Studies, 125, 327–369.CrossRefGoogle Scholar
  40. Tuomela, R. & Miller, K. (1988). We-intentions. Philosophical Studies, 53, 367–390.CrossRefGoogle Scholar
  41. Velleman, J. D. (1997). How to share an intention. Philosophy and Phenomenological Research, 57(1), 29–50.CrossRefGoogle Scholar
  42. Young, H. P. (1998). Individual strategy and social structure: An evolutionary theory of institutions. Princeton, New Jersey: Princeton University Press.Google Scholar

Copyright information

© Springer Science+Business Media B.V. 2006

Authors and Affiliations

  1. 1.Department of PhilosophyUniversity of Missouri-ColumbiaColumbiaUSA

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