Based on fieldwork he conducted in this Zapotec-speaking community between 1992 and 1996, Jeffrey Cohen describes continuities in the Santañeros' practices of cooperation, as well as changes resulting from transnational migration, tourism, increasing educational opportunities, and improved communications. His nuanced portrayal of the benefits and burdens of cooperation is buttressed by the words of many villagers who explain why and how they participate-or not-in reciprocal family and community networks. This rich ethnographic material offers a working definition of community created in and through cooperative relationships.