It has been shown that psychological predispositions to benefit others can motivate human
cooperation and the evolution of such social preferences can be explained with kin or multi …

Reciprocal altruism has been the backbone of research on the evolution of altruistic
behaviour towards non-kin, but recent research has begun to apply costly signalling theory …

The benefits of a good reputation can help explain why some individuals are willing to be
altruistic in situations where they will not receive direct benefits. Recent experiments on …

Altruism is behaviorally defined as an act that benefits others at the expense of the actor.
Altruism is usually associated with helping others in need, but it can also take place in the …

This paper provides strong evidence challenging the self-interest assumption that dominates
the behavioral sciences and much evolutionary thinking. The evidence indicates that many …

Recent research suggests that altruism can be surprisingly tenuous; minor situational
variations can turn altruism on and off. For example, if provided with sufficient …

Recent experimental research has revealed forms of human behavior involving interaction
among unrelated individuals that have proven difficult to explain in terms of kin or reciprocal …

In order for non‐kin altruism to evolve, altruists must receive fitness benefits for their actions
that outweigh the costs. Several researchers have suggested that altruism is a costly signal …

People usually engage in (or at least profess to engage in) altruistic acts to benefit others.
Yet, they routinely fail to maximize how much good is achieved with their donated money …

Extraordinary acts of altruism towards strangers represent puzzling phenomena not easily
explained by dominant biological models of altruism, such as kin selection and reciprocity …