Brief compendium of research proving humans are natural cooperators and givers, with the caveat that some are not. Givers gain. He cites Yochai Benkler of Harvard Law, in “The Penguin and the Leviathan: the Triumpg of Cooperation Over Self-Interest,” about 30% of people do behave selfishly, but “fully half of all people systematically, significantly and predictably behave cooperatively.” https://www.kirkusreviews.com/book-reviews/yochai-benkler/penguin-and-leviathan/ Measures of expectations of cooperation, ie trust, have declined significantly the past two decades. In the United States, trust is down from just over 30% to 18%. In one extreme, in countries such as Norway and Sweden, more than 60% of respondents agree that most people can be trusted. And in the other extreme, in countries such as Colombia, Brazil, Ecuador and Peru, less than 10% think that this is the case. Trust and cooperation are key to personal, business, societies’ success. Consider “The Speed of Trust,” by Stephen M.R. Covey, in which he explains why trust is a game-changer in every personal and professional relationship and lays out a roadmap for building and leveraging trust for success.