Maybe you're one of those people who took a cheek swab and sent a little vial off to a lab, to tell you--based on your DNA--where your ancestors might have lived. Our ability to understand the genes of humans has never been better.
Yet somehow, racism seems to be rampant in the world at the moment, with some people feeling they are genetically superior to others. They are clearly not, as Adam Rutherford points out anew in How to Argue With a Racist: What Our Genes Do (and Don't) Say About Human Difference.
The author, both geneticist and science writer/broadcaster, brings in the evidence of shared humanity.