Some argue that these genes bring benefits - mental illness and genius have a long-standing link - but archaeologist Penny Spikins at the University of York, UK, goes further. She believes that mental illness and conditions such as autism persist at such high levels because in the past they were advantageous to humanity. "I think that part of the reason Homo sapiens were so successful is because they were willing to include people with different minds in their society - people with autism or schizophrenia, for example."
Not long ago I was sitting at home writing something for publication - I won't say what, except that it was a passage about a certain politician on the Hill. Out of habit I launched into a description that was full of nasty and personal language, and I was about to press on to the next part of the piece when suddenly I hit a mental speed bump. A voice in my head whispered - this really happened - "If you write that shit and Bernie Sanders sees it, he's going to be disappointed in you." So I went back and removed the gratuitous body blows from the article.