Editing Neuroscience and intelligence (section)

===Brain size===
Another theory of [[brain size]] in vertebrates is that it may relate to social rather than mechanical skills. Cortical size relates directly to pair-bonding [[Life style (sociology)| lifestyle]] and among primates, cerebral cortex size varies directly with the demands of living in a large complex social network. Compared to other mammals, primates have significantly larger brain sizes. Additionally, most primates are found to be [[Polygynandry|polygynandrous]], having many social relationships with others. Although inconclusive, some studies have shown that this polygynandrous statue correlates to brain size.<ref>{{cite journal|author=Dunbar RI, Shultz S|date=2007-09-07|title=Evolution in the social brain|journal=Science|volume=317|pages=1344–1347|doi=10.1126/science.1145463|pmid=17823343|issue=5843|last2=Shultz|bibcode=2007Sci...317.1344D|s2cid=1516792}}</ref>

Intelligence in chimpanzees has been found to be related to brain size, grey matter volume, and cortical thickness, as in humans.<ref>{{Cite journal|last1=Hopkins|first1=William D.|last2=Li|first2=Xiang|last3=Roberts|first3=Neil|date=November 2018|title=More intelligent chimpanzees (Pan troglodytes) have larger brains and increased cortical thickness|journal=Intelligence|volume=74|pages=18–24|doi=10.1016/j.intell.2018.11.002|s2cid=150309083 }}</ref>