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Science 23 June 2006:
Vol. 312. no. 5781, p. 1727
DOI: 10.1126/science.312.5781.1727a
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News of the Week

PSYCHOLOGY:
The Value of the Stick: Punishment Was a Driver of Altruism

Yudhijit Bhattacharjee

Altruism has long been an evolutionary mystery. On page 1767 of this issue of Science, anthropologists conclude that such helpful behavior may have arisen as a result of punishment. (Read more.)

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Science. ISSN 0036-8075 (print), 1095-9203 (online)