Simply Psychology, fifth edition, is an engaging and reader-friendly introduction to the key
principles of psychology. Organised around the major approaches to the subject, it covers …

Biological and social systems are structured at multiple scales, and the incentives of
individuals who interact in a group may diverge from the collective incentive of the group as …

Despite the importance of population structures throughout ecology, relatively little
theoretical attention has been paid to understanding the implications of social groups for …

In many biological systems, natural selection acts simultaneously on multiple levels of
organization. This scenario typically presents an evolutionary conflict between the incentive …

Most human societies are characterized by the presence of different identity groups which
cooperate but also compete for resources and power. To deepen our understanding of the …

Research on how competitors assess (ie, gather information on) fighting ability and
contested resources, as well as how assessment impacts on contest processes and …

Without heritable variation, natural selection cannot effect evolutionary change. In the case
of group selection, there must be variation in the population of groups. Where does this …

The evolution of complex cellular life involved two major transitions: the encapsulation of self-
replicating genetic entities into cellular units and the aggregation of individual genes into a …

Two mechanisms that have been used to study the evolution of cooperative behavior are
altruistic punishment, in which cooperative individuals pay additional costs to punish …

In this thesis, we explore the fundamental evolutionary conflict between the individual
incentive to cheat and the collective incentive to be part of a cooperative group. Our focus is …