Abstract
I first discuss two aspects of a social order and cooperation which might be of high relevance: the problem of a spontaneous emerging of a social order, and the relation between exchange and cooperation. In doing so, I also discuss the role of production in separating areas of cooperation from those of competition. Second, I look more closely at the motivations for cooperative behaviour. It is argued that of the four kinds of motivation mentioned by Leist only two, self-interest and altruism, are really necessary to explain cooperation.