Friendship’s Dark Side: ‘We Need a Common Enemy’ Friendship generally is regarded as an unalloyed good. But scientists have found it also can be a conspiracy, a way to separate “us” from “them.” Share: Facebook Twitter Google+ Stumble Digg Email ThisBlogThis!Share to XShare to Facebook Related Posts:Watch SpaceX’s Falcon Heavy Second Try for a Satellite LaunchTime travel PROOF: How Brian Cox claimed future travel IS possible – ‘We’ve DONE it!’Measles Outbreak: Tensions Rise as New York City Steps Up ResponseHow Katie Bouman Accidentally Became the Face of the Black Hole ProjectNASA reveals GROUNDBREAKING research on twin astronauts - ‘Most comprehensive EVER’Opioid Sales Reps Swarmed New York at Height of Crisis