David M. Carballo

Departing from the political economy perspective taken by the vast majority of volumes devoted to Mesoamerican obsidian, Obsidian Reflections is an examination of obsidian's sociocultural dimensions—particularly in regard to Mesoamerican world view, religion, and belief systems.

Past archaeological literature on cooperation theory has emphasized competition's role in cultural evolution. As a result, bottom-up possibilities for group cooperation have been under theorized in favor of models stressing top-down leadership, while evidence from a range of disciplines has demonstrated humans to effectively sustain cooperative undertakings through a number of social norms and institutions. Cooperation and Collective Action is the first volume to focus on the use of archaeological evidence to understand cooperation and collective action.