<div style="margin: 12px 0px; font-family: arial; color: #333333; background: #ffffff; border: solid 4px #e5e5e5; width: 100%; clear: left;"><div class="CM_CTB_Content_Wrap" style="margin: 0px; padding: 0px;background-color: #ffffff;"><div style="border-bottom: solid 1px #dcdcdc; white-space: nowrap; margin-bottom: 8px; background-color: #eeeeee ;background-image: url(http://clipmarks.com/images/source-bg.gif); background-repeat: repeat-x; height: 24px; line-height: 24px; vertical-align: middle; padding-bottom: 4px; color: #666666; font-size: 10px;" ><a href="http://clipmarks.com/clip-to-blog/" title="see clips that are hot right now"><img src="http://content.clipmarks.com/blog_embed/5a64a3c3-035a-479f-8b2c-da5f486100f4/005C8C06-FAC1-49DA-B44C-ABF33E777346/" alt="" width="19" height="19" border="0" style="vertical-align: middle; margin: 0px 4px; display: inline; border: none; float:none;" /></a>clipped from <a title="http://www.nature.com/nature/journal/v454/n7201/abs/nature06940.html" href="http://www.nature.com/nature/journal/v454/n7201/abs/nature06940.html" style="font-size: 11px;">www.nature.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.nature.com/nature/journal/v454/n7201/abs/nature06940.html">Humans often cooperate in public goods games<SUP><A href="http://www.nature.com/nature/journal/v454/n7201/full/nature06940.html#B1">1, </A></SUP><SUP><A href="http://www.nature.com/nature/journal/v454/n7201/full/nature06940.html#B2">2, </A></SUP><SUP><A href="http://www.nature.com/nature/journal/v454/n7201/full/nature06940.html#B3">3</A></SUP> and situations ranging from family issues to global warming<SUP><A href="http://www.nature.com/nature/journal/v454/n7201/full/nature06940.html#B4">4, </A></SUP><SUP><A href="http://www.nature.com/nature/journal/v454/n7201/full/nature06940.html#B5">5</A></SUP>. However, evolutionary game theory predicts<SUP><A href="http://www.nature.com/nature/journal/v454/n7201/full/nature06940.html#B4">4, </A></SUP><SUP><A href="http://www.nature.com/nature/journal/v454/n7201/full/nature06940.html#B6">6</A></SUP> that the temptation to forgo the public good mostly wins over collective cooperative action, and this is often also seen in economic experiments<SUP><A href="http://www.nature.com/nature/journal/v454/n7201/full/nature06940.html#B7">7</A></SUP>. Here we show how social diversity provides an escape from this apparent paradox.</blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.nature.com/nature/journal/v454/n7201/abs/nature06940.html">Our results may help to explain the emergence of cooperation in the absence of mechanisms based on individual reputation and punishment<SUP><A href="http://www.nature.com/nature/journal/v454/n7201/full/nature06940.html#B10">10, </A></SUP><SUP><A href="http://www.nature.com/nature/journal/v454/n7201/full/nature06940.html#B11">11, </A></SUP><SUP><A href="http://www.nature.com/nature/journal/v454/n7201/full/nature06940.html#B12">12</A></SUP>. Combining social diversity with reputation and punishment will provide instrumental clues on the self-organization of social communities and their economical implications.</blockquote></div><div style="margin: 0px 6px 6px 4px;"><table style="font-size: 11px;border-spacing: 0px;padding: 0px;" cellpadding="0" cellspacing="0" width="100%"><tr><td style="background:transparent;border-width:0px;padding:0px;">&nbsp;</td><td align="right" style="background:transparent;border-width:0px;padding:0px;width:107px" width="107"><a href="http://clipmarks.com/share/005C8C06-FAC1-49DA-B44C-ABF33E777346/blog/" title="blog or email this clip"><img src="http://content8.clipmarks.com/images/c2b-foot.png" border="0" alt="blog it" width="107" height="17" style="border-width:0px;padding:0px;margin:0px;" /></a></td></tr></table></div></div>

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