Since homo sapiens is a social animal, one might expect human nature the set of psychological propensities with which our species is naturally endowed to equip human beings to live in social groups. In this chapter, we consider the implications of this idea for economics and game theory. We...

We develop a theory of interstate conflict in which the degree of genealogical relatedness between populations has a positive effect on their conflict propensities because more closely related populations, on average, tend to interact more and develop more disputes over sets of common issues. We...