Part two of this BBC portrait of Charles Darwin focuses on the legacy of his theories on evolution and the implications of his writings. Using Natural Selection as a starting point, the program explores the often contentious implications of Darwin's work including: Eugenics, Group Selection, Sociobiology, Evolutionary Psychology and Coevolution. While Darwin's theories are central to these ideas, they each provide a basis of discourse on the far-reaching implications of what evolutionary thought can teach us about human nature.