Current work on cooperation is focused on the theory of reciprocal altruism. However, reciprocity
is just one way of getting a return on an investment in altruism and is difficult to apply to …

We examined the effect of an image of a pair of eyes on contributions to an honesty box used
to collect money for drinks in a university coffee room. People paid nearly three times as …

Arising from MA Nowak, CE Tarnita & EO Wilson Nature466, 1057–1062 (2010)10.1038/nature09205
; Nowak et al. reply Nowak et al. argue that inclusive fitness theory has been of …

Reciprocal altruism 1 can become established among selfish, unrelated individuals if they
use responsive strategies such as ‘tit-for-tat’ 2 , 3 , 4 . This result raises the fundamental …

A reduction in individual vigilance with an increase in group size is one of the most frequently
reported relationships in the study of animal behaviour. It has been argued that this …

Cooperation is fundamental to human societies and widespread among animals, yet explaining
how cooperative relationships persist without one party exploiting another remains a …

Explaining unconditional cooperation, such as donations to charities or contributions to public
goods, continues to present a problem. One possibility is that cooperation can pay through …

This article talks about altruism and morality. It defines altruism in terms of a design to benefit
others at a cost to oneself, altruism is defined in terms of a motivation to help. It is often …

A number of studies have shown that the presence of simple images of eyes in the
environment increases prosocial behaviour in humans. However, questions remain about the …

When one individual helps another, it benefits the recipient and may also gain a reputation
for being cooperative. This may induce others to favour the helper in subsequent interactions, …