We trace the difference between the ways in which apes and humans co–operate to differences in communicative abilities, claiming that the pressure for future–directed co–operation was a major force behind the evolution of language. Competitive co–operation concerns goals that are present in the environment and have stable values. It relies on either signalling or joint attention. Future–directed co–operation concerns new goals that lack fixed values. It requires symbolic communication and context–independent representations of means and goals. We analyse these ways of (...) co–operating in game–theoretic terms and submit that the co–operative strategy of games that involve shared representations of future goals may provide new equilibrium solutions. (shrink)

The paper argues that contexts of interaction are structured in a way that coordinates part actions into normatively guided joint action without agents having common knowledge or mutual beliefs about intentions, beliefs, or commitments to part actions. The argument shows earlier analyses of joint action to be fundamentally flawed because they have not taken contextual influences on joint action properly into account. Specific completion of earlier analyses is proposed. It is concluded that attention to features distributed in context of interaction (...) that signal expected part actions is sufficient for a set of part actions to qualify as a joint action. (shrink)

1. Introduction; 2. Indexical self-awareness; 3. Detached self-awareness; 4. Social self-awareness; 5. Basic social self-awareness; 6. Developed social self-awareness; 7. Person-consciousness.