“The most surprising result to come out of these global genetic studies is that the human species is exceedingly uniform. Despite superficial regional differences in hair and skin colour, or skull shape, the genetic diversity among the 7.5 billion humans living in the world today is astonishingly low.30 In fact, there’s more genetic diversity between two groups of chimpanzees living on opposite banks of a river in Central Africa than there is between humans on opposite sides of the world.31.”