A powerful new theory of human nature suggests that our secret to success as a species is our unique friendliness "Brilliant, eye-opening, and absolutely inspiring--and a riveting read. Hare and Woods have written the perfect book for our time."--Cass R. Sunstein, author of How Change Happens and co-author of Nudge For most of the approximately 300,000 years that Homo sapiens have existed, we have...