What is race?

Depending on who you ask you could get very different answers.

The trouble is that race is determined by differences and similarities deemed by society to be socially significant - something that has proven to be deeply problematic for centuries.

Jonathan speaks to Gavin Evans, author of 'Skin Deep: Journeys in the Divisive Science of Race' to examine the new discoveries in archaeology, genetics and IQ studies that show decisively that there are no innate differences between population groups when it comes to intelligence or character and that what we call race, really is just skin deep.