Why do humans, uniquely among animals, cooperate in large numbers to advance projects
for the common good? Contrary to the conventional wisdom in biology and economics, this …

This book is derived from a conference entitled “Man the Hunted and the Origin and Nature
of Human Sociality, Altruism and Well-Being” held at Washington University, March, 2009 …

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 …

Here biologist Lee Dugatkin outlines four paths to cooperation shared by humans and other
animals: family dynamics, reciprocal transactions (or" tit for tat"), so-called selfish teamwork …

A spate of recent investigations on reciprocation and social enforcement in humans has
brought together (and sometimes divided) economists, psychologists, anthropologists, social …

Human groups maintain a high level of sociality despite a low level of relatedness among
group members. This paper reviews the evidence for an empirically identifiable form of …

“Two are better than one; because they have a good reward for their labour. For if they fall,
the one will lift up the other: but woe to him that is alone when he falleth; for he hath not …

After three decades of worldwide research on reciprocal altruism and related phenomena,
no more than a modest number of animal examples have been identified. Even in primates …

In recent years, a large number of experimental studies have documented the existence of
strong reciprocity among humans. Strong reciprocity means that people willingly repay gifts …

Human morality is a key evolutionary adaptation on which human social behavior has been
based since the Pleistocene era. Ethical behavior is constitutive of human nature, we argue …