Pop culture, travel and books help push it a little bit. Nat: We have ingrained xenophobic tendencies we have pretty strong. And i was amazed at how quickly so many people, not just americans, but others in great britain and turkey and a few of the other autocratcratic countries now in a turn to ism. You know, si ye, i mean that obviously it's in our nature, and it's easy to go back to that pretty quickly.
In a few decades, a torrent of new evidence and ideas about human evolution has allowed scientists to piece together a more detailed understanding of what went on thousands and even millions of years ago. Lesley Newson and Peter Richerson, a husband-and-wife team based at the University of California, Davis, have spent years together and individually researching and collaborating with scholars from a wide range of disciplines to produce a deep history of humankind. In A Story of Us, they present this rich narrative and explain how the evolution of our genes relates to the evolution of our cultures.