Small-scale human societies range from foraging bands with a strong egalitarian ethos to more economically stratified agrarian and pastoral societies. We explain this variation in inequality using a dynamic model in which a population's long-run steady-state level of inequality depends on the...

Where such behaviors as risk-taking and hard work are not subject to complete contracts, some distributions of assets (for instance the widespread use of tenancy) may preclude efficient contractual arrangements. In particular, the distribution of wealth may affect: (a) residual claimancy over...

Would improving the economic, social, and political condition of the world's disadvantaged people slow--or accelerate--environmental degradation? In Inequality, Cooperation, and Environmental Sustainability, leading social scientists provide answers to this difficult question, using new research...