Abstract: The evolutionary aspects of acting as a group member and cooperation are discussed in this chapter. It is argued that the disposition to act as a group member (and, accordingly, to cooperate) is a coevolutionary adaptation, a stable feature typically involving both biological and cultural elements. This chapter sketches an account of the dynamics and change of social practices. Three types of group change are focused on. The main change mechanism is taken to be social learning (e.g., imitation) based on conformism, thus we-attitudes. This theoretical account squares well with other, empirically supported work in the field.

Keywords: coevolutionary adaptation,, collective intentionality as adaptation,, cultural evolution,, group change,, we-mode as adaptation,