Ever since Darwin, animal behavior has intrigued and perplexed human observers. The
elaborate mating rituals, lavish decorative displays, complex songs, calls, dances and many …

In both biology and the human sciences, social groups are sometimes treated as adaptive
units whose organization cannot be reduced to individual interactions. This group-level view …

The phenomenon of" helping at the nest" has exposed ornithologists to the problem of the
evolution of altruism, ie why should a non-breeder invest in the fitness of breeders rather …

Evolutionary game theory has become one of the most diverse and far reaching theories in
biology. Applications of this theory range from cell dynamics to social evolution. However …

The human aptitude for collective action may have implications for how the theory of kin
selection applies to human kinship. Several models show that if two or more individuals act …

Social dilemmas are an integral part of social interactions. Cooperative actions, ranging from
secreting extra-cellular products in microbial populations to donating blood in humans, are …

William D. Hamilton famously stated that “human life is a many person game and not just a
disjoined collection of two person games". However, most of the theoretical results in …

If food is patchily dispersed, food clumps being very rich, but rare and hard to find, each
individual in a foraging flock then faces an evident dilemma: whether to co-operate and …

In both biology and the human sciences, social groups are sometimes treated as adaptive
units whose organization cannot be reduced to individual interactions. This group-level view …

Many models proposed to study the evolution of collective action rely on a formalism that
represents social interactions as n-player games between individuals adopting discrete …