Evolution on a restless planet: Were environmental variability and environmental change major drivers of human evolution? With Robert L. Bettinger and Robert Boyd. In press in Handbook of Evolution Vol. 2 edited by Franz M. Wuketits and Francisco J. Ayala. 2005. Adobe pdf file.

Applying formal models to the laboratory study of social learning:The impact of task difficulty and environmental fluctuation. With Richard McElreath, Mark Lubell, Peter J. Richerson, Timothy M. Waring, William Baum, Edward Edsten, and Charles Efferson, and Brian Paciotti

Darwinian Evolutionary Ethics: Between Patriotism and Sympathy. With Robert Boyd. Submitted for inclusion in Evolutionary Ethics: Biological and Theological Perspectives on Human Morality, Philip Clayton and Jeffrey Schloss, editors.

Cultural Evolutionary Theory: A Synthetic Theory for Fragmented Disciplines. With Brian Paciotti and Robert Boyd. Submitted to Bridging Social Psychology, Paul Van Lange, Editor. Adobe pdf file.

Cultural Evolution in Laboratory Micro-Societies Including Traditions of Rule-Giving and Rule-Following with William M. Baum, Charles M. Efferson , and Brian M. Paciotti. Submitted to Evolution and Human Behavior. Adobe pdf file.

Culture, Adaptation, and Innateness, with Robert Boyd. In: The Innate Mind: Culture and Cognition, P. Carruthers, S. Stich, & S. Laurence, eds., in press. Adobe pdf file.

Cultural Evolution of Human Cooperation, with Robert Boyd and Joe Henrich. Submitted for inclusion in Dahlem Conference Report The Genetic and Cultural Evolution of Cooperation, Edited by Peter Hammerstein. Adobe pdf file.

Five Misunderstandings About  Cultural Evolution, with Joseph Henrich and Robert Boyd. Submitted for inclusion in a book edited by Daniel Sperber. Adobe pdf file.

Cultural Selection and Genetic Diversity in Humans, with Hal Whitehead and Robert Boyd. Selection 3:115-125,  2002. Adobe pdf file.

Cooperation and Conflict, Large Scale Human, with Francisco Gil-White. In press in Encyclopedia of Cognitive Science, Macmillan. Adobe pdf file.

Shared Norms Can Lead to the Evolution of Ethnic Markers, with Richard McElreath and Robert Boyd. 2003, Current Anthropology 44: 122130 Adobe pdf file. Electronic Enhancements.

Group Beneficial Norms Can Spread Rapidly In a Structured Population, with Robert Boyd. 2002,  Journal of Theoretical Biology 215: 287296.  Adobe pdf file.

Solving the Puzzle of Human Cooperation, with Robert Boyd. In press in Evolution and Culture, S. Levinson ed. MIT Press, Cambridge MA, in press. Adobe pdf file.

The Evolution of Altruistic Punishment, with Robert Boyd, Herbert Gintis and Samuel Bowles. 2003. Proceedings of the National Academy of Sciences (USA) 100: 35313535. Adobe pdf file.

An Evolutionary Theory of Commons Management, with Robert Boyd and Brian Paciotti. 2002. In Elinor Ostrom, Thomas Dietz, Nives Dolsak, Paul C. Stern, Susan Stonich, and Elke U. Weber (eds.) The Drama of the Commons. National Academy Press. Pp. 403-442. Adobe pdf file.

Meme Theory Oversimplifies Cultural Change. With Robert Boyd. Scientific American, October 2002, Pp. 54-55.

Built For Speed, Not for Comfort: Darwinian Theory and Human Culture, with Robert Boyd. 2001. In History and Philosophy of the Life Sciences 23: 423-463. Adobe pdf file.

The Evolution of Subjective Commitment to Groups: A Tribal Instincts Hypothesis, with Robert Boyd. 2001. In Randolph M. Nesse (ed.) The Evolution of Commitment. New York: Russell Sage Foundation. Pp. 186-220. Adobe pdf file.

Was Agriculture Impossible During the Pleistocene But Mandatory During the Holocene? A Climate Change Hypothesis, with Robert Boyd and Robert L. Bettinger. 2001.  American Antiquity 66: 387-411. Adobe pdf file.

Culture Is Part of Human Biology: Why the Superorganic Concept Serves the Human Sciences Badly, with Robert Boyd. In Science Studies: Probing the Dynamics of Scientific Knowledge, edited by S. Maasen and M. Winterhager, transcript Verlag, 2001. Also, to be published in Probing Human Origins, edited by Morris Goodman and Anne Simon Moffat, The American Academy of Arts & Sciences, Cambridge, MA. Adobe pdf file.

Institutional Evolution in the Holocene: The Rise of Complex Societies, with Robert Boyd. In The Origin of Human Social Institutions, pp. 197-204, 2001, W.G. Runciman, editor. Proceedings of the British Academy 110. Adobe pdf file.

Norms and Bounded Rationality, with Robert Boyd. In: The Adaptive Tool Box, G. Gigerenzer and R. Selten, eds. pp 281296, MIT Press, Cambridge MA, 2001. Adobe pdf file.

Memes: Universal Acid or Better Mouse Trap, with Robert Boyd.  In: Darwinizing Culture: The Status of Memetics as a Science. R. Aunger ed. pp.143162, Oxford University Press, Oxford. 2000.  Adobe pdf file.

The Pleistocene and the Origins of Human Culture: Built for Speed,   with Robert Boyd. In Perspectives in Ethology, Vol. 13:1-45, 2000, Francois Tonneau and Nicholas Thompson, editors. Adobe pdf file.

Climate, Culture, and the Evolution of Cognition, with Robert Boyd. In C.M. Heyes and L. Huber, Editors, The Evolution of Cognition, MIT Press, 2000. Adobe pdf file.

Evolution: The Darwinian Theory of Social Change: An Homage to Donald T. Campbell, with Robert Boyd.  In: Paradigms of Social Change, pp. 257-282, 2000, Waltrud Schelkle, Wolf-Hagen Krauth, Martin Kohli, and Georg Elwer (eds.), Frankfurt: Campus Verlag. Adobe pdf file.

Constraints on Social Transmission of Food Selection by Roof Rats, Rattus rattus, With Lien-Siang Chou and Rex E. Marsh.  Acta Zoologica Taiwanica, 2000, 11: 95-109. Adobe pdf file.

Complex Societies: The Evolutionary Origins of a Crude Superorganism, with Robert Boyd.  Human Nature, 1999, 10: 253-289. Adobe pdf file.

 The Evolution of Human Ultra-sociality, with Robert Boyd.  I.  Eibl-Eibesfeldt and F. K. Salter (eds.), Indoctrinability, Ideology and Warfare. New York: Berghahn Books. Pp. 71-96, 1998. Adobe pdf file.

Homage to Malthus, Ricardo, and Boserup: Toward a General Theory of Population, Economic Growth, Environmental Deterioration, Wealth and Poverty. With Robert Boyd. Human Ecology Review 4: 85-90, 1998. Adobe pdf file.

Are Cultural Phylogenies Possible? With R. Boyd, M. Borgerhoff Mulder and W.H. Durham. In: P. Weingart, P.J. Richerson, S.D.Mitchell, and S. Maasen (eds.), Human by Nature, Between Biology and the Social Sciences,  Lawrence Erlbaum Associates: Mahwah, NJ, 1997. Pp. 355386. Adobe pdf file.

Why Culture is Common but Cultural Evolution is Rare, with Robert Boyd. Proceedings of the British Academy, 88: 7393, 1996. Adobe pdf file.

Can Group-functional Behaviors Evolve by Cultural Group Selection?  An Empirical Test, with Joseph Soltis and Robert Boyd. Current Anthropology, 63: 473494, 1995. Adobe pdf file.

Why Does Culture Increase Human Adaptability? With Robert  Boyd. Ethology and Sociobiology. 16: 125143, 1995. Adobe pdf file.

How Microevolutionary Processes Give Rise to History. With Robert Boyd. In History and Evolution, M.H. and D.V. Nitecki (eds.), SUNY Press, Albany, 1992, pp. 178-209. Adobe pdf file.

Rationality, Imitation, and Tradition. With Robert Boyd. In Nonlinear Dynamics and Evolutionary Economics, R. Day and P. Chen (eds.), Oxford University Press, New York, 1993, pp. 131-149. Adobe pdf file.

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