@article{ref1,
title="Being human: Conflict: Altruism's midwife",
journal="Nature",
year="2008",
author="Bowles, Samuel",
volume="456",
number="7220",
pages="326-327",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0028-0836",
doi="10.1038/456326a",
url="http://dx.doi.org/10.1038/456326a"
}