Disentangling the motivations and institutions that foster group cooperation among competitive individuals remains one of the few great conundrums within evolutionary theory. The breadth and material focus of archaeology provide a much needed complement to existing research on cooperation and collective action, which thus far has relied largely on game-theoretic modeling, surveys of college students from affluent countries, brief ethnographic experiments, and limited historic cases. In Cooperation and Collective Action, diverse case studies address the evolution of the emergence of norms, institutions, and symbols of complex societies through the last 10,000 years. This book is an important contribution to the literature on cooperation in human societies that will appeal to archaeologists and other scholars interested in cooperation research.

Exploring the materiality of this volcanic glass rather than only its functionality, this book considers the interplay among people, obsidian, and meaning and how these relationships shaped patterns of procurement, exchange, and use. An international group of scholars hailing from Belize, France, Japan, Mexico, and the United States provides a variety of case studies from Mexico, Guatemala, Belize, and Honduras. The authors draw on archaeological, iconographic, ethnographic, and ethnohistoric data to examine obsidian as a touchstone for cultural meaning, including references to sacrificial precepts, powerful deities, landscape, warfare, social relations, and fertility.

Obsidian Reflections underscores the necessity of understanding obsidian from within its cultural context—the perspective of the indigenous people of Mesoamerica. It will be of great interest to Mesoamericanists as well as students and scholars of lithic studies and material culture.