Source: https://www.washingtonpost.com/national/health-science/loneliness-can-be-depressing-but-it-may-have-helped-humans-survive/2016/09/02/c01a15f4-38a0-11e6-8f7c-d4c723a2becb_story.html?utm_campaign=pockethits&utm_medium=email&utm_source=pocket