Abstract: This chapter briefly introduces the central concepts of the theory developed in the book. Thus collective intentionality and the accompanying “we-perspective” both in the full, we-mode sense and in the “private”, I-mode sense are introduced. A preliminary survey of the contents of the chapters is given and the most central theses, twelve of them, of the theory are presented in this introduction.

Keywords: acting as a group member,, collective acceptance,, collective commitment,, collective constitution,, collective intentionality,, cultural evolution,, group action,, group attitude,, group reason,, group responsibility,, I-mode,, I-mode cooperation,, institutional status,, joint action,, joint intention,, progroup I-mode,, social institution,, we-attitude,, we-mode,, we-mode cooperation,, we-perspective,