"Cooperation..."

Cooperation to me means; we can cooperate to build a house or to write a book. In such cases cooperation is a joint action. In some other cases cooperation can fall short of being a proper joint action, the drivers in the street cooperate by following traffic rules, but they do not always act jointly (at least in the sense in which I will be speaking of joint action). While some comments on such cooperation will he made later in the paper, the focus of this is cooperative joint action. Every joint action type - be it cooperative or noncooperative - can be performed both cooperatively and non cooperatively.