We model the coevolution of behavioral strategies and social learning rules in the context of a cooperative dilemma, a situation in which individuals must decide whether or not to subordinate their own interests to those of the group. There are two learning rules in our model, conformism and...

We develop an endogenous fertility model of social stratification with two hereditary classes: warriors and peasants. Our model shows that the extra cost warriors must incur to raise their children and to equip them for war is the key determinant of (1) the relative sizes of both classes, and...