<div dir="ltr"><div dir="ltr"><br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Jun 14, 2021 at 7:13 AM Stuart LaForge via extropy-chat <<a href="mailto:extropy-chat@lists.extropy.org">extropy-chat@lists.extropy.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><br><br>
In fact, all but three of the geographic region/culture on the graph <br>
experienced the Culling almost immediately after domesticating a <br>
specific animal. The East and South East Asians were culled right <br>
after they domesticated chickens and pigs. The Andean people in South <br>
America experienced the Culling right after they domesticated the <br>
llama and the alpaca. Chickens, pigs, and llamas have no obvious use <br>
in warfare, yet nonetheless presaged the Culling in their respective <br>
cultures.<br></blockquote><div><br></div><div>### Animal domestication is a proxy for farming and high-density settlements. A transition from hunting-gathering to farming and animal husbandry will reduce genetic diversity in two ways: Firstly, the initially small farmer founding population will explode in numbers thanks to being able to harvest a much higher fraction of available biomass per square mile, and their Y lineages will simply outnumber the hunter-gatherer lineages (this is a relative reduction of lineage diversity due to founder effects). Secondly, living in high-density settlements accelerates evolution of cooperative behaviors, especially the ability to avoid intragroup violence (elimination of jerks started long before agriculture but high-density living accelerated it significantly because of the significantly higher psychological stress associated with this lifestyle - the calm ones survive relatively better when people are cooped-up). Such highly cooperative and numerous farmers can wear the less organized and less numerous hunter-gatherers down over time, but of course they will kill only men, and keep women as property. This will be an absolute reduction in Y lineage diversity.</div><div><br></div><div>Rafal </div></div></div>