In the second episode of this three-part series, geneticist and broadcaster Adam Rutherford explores the complex and sometimes controversial world of human evolution.
He talks to geneticists, evolutionary psychologists and anthropologists to try and understand and untangle the relationship between our biology, our genes and our cultural and social behaviour.
Have we, as Professor Steve Jones thinks, evolved beyond evolution by natural selection?
He thinks that in the western, developed world, the normal driving force for evolution by natural selection is tailing off.
We are all having a similar number of babies and those children are surviving and having children of their own.
The impact of this is that there's no longer an opportunity for genes which may be beneficial to be selectively passed on.
As these trends increase, he says that "if we haven't already stopped evolving, we soon will."
Seeing evolution in action isn't easy, by its very nature, it only occurs on a gene