Why we prefer people just like us. And why that’s potentially dangerous. | Nicholas Christakis

- It's common for people to form groups of like minded individuals who also have similar abilities. - Evolution confers advantages on heterogeneous groups of people and groups with diverse talent sets. - Prizing individual identity ahead of group identity also helps counteract tribalistic politics. Nicholas A. Christakis is a physician, sociologist, and director of the Human Nature Lab at Yale University, where he is the Sterling Professor of Social and Natural Science. His most recent book is Blueprint: The Evolutionary Origins of a Good Society (https://amzn.to/2VpXp3S) Follow him on Twitter @NAChristakis Read more at BigThink.com: http://bit.ly/2Zab4OM Follow Big Think here: YouTube: http://goo.gl/CPTsV5 Facebook: http://bit.ly/1qJMX5g Twitter: https://twitter.com/bigthink