The Mamirauá Sustainable Development Reserve in the

Brazilian state of Amazonas. It includes mostly Amazonian flooded forest and wetlands. Around 1800 families live inside Mamiraua. They are the descendants of different tribes of Amerindians, and subsist on fishing, sustainable agriculture and community management of the forest products. The management of the forest and lakes is organised by the communities. This setting is a natural experiment to understand how cooperation evolves and is maintained and how public goods are managed in cooperative systems. Understanding the natural/adaptive dynamics of large scale cooperation has practical implications for 

conservation and sustainable development.