The syndrome is common in the Amish because of the "founder effect." When a small part of a population moves to a new locale, or when the population is reduced to a small size because of some ...

Evolutionary set theory is a powerful modeling framework that can be used to study how cooperation is affected by population structure. In this framework, people belong to groups and can ...

Cooperation and competition have a fitness face off in game theory. Evolutionary ... Leimar, O. Evolution of fighting behavior - the effect of variation in resource value. J.