Cooperation is the fundamental feature of intelligent beings. It makes them able to evolve complex social behaviors and to better resolve practical issues. Humans have evolved a very powerful form of cooperation, which is spread anywhere in the everyday life: norms, institutions, states, hierarchies, ordinary relationships, etc., are deeply determined by the original notion of cooperation. This book addresses the conditions of the human cooperative activities in order to focus on their common roots and to bring them back to an unitary origin. It is profoundly animated by the task of understanding how cooperative skills are able to evolve the plurality of the cooperative activities from