In this episode, a question that haunted Charles Darwin: if natural selection boils down to survival of the fittest, how do you explain why one creature might stick its neck out for another?
In a brief snippet from a conversation Robert had with Richard Dawkins at the 92 Street Y in New York City, we learn that natural selection is often a brutal arms race, inherently full of suffering and cruelty. But if Darwin's big idea is really predicated on pain and selfishness, ...