The reference made part way through the interview when talking about the role of generosity in evolution is the great book The Generous Man - How Helping Others is the Sexiest Thing You Can Do by Tor Norretranders.

In the book he introduces the novel concept that generosity, creativity and cooperativeness serve a singular evolutionary purpose of making us sexier.

If you’d like to hear an excerpt of Tor Norretranders speaking about game theory, altruism and economics here is a short audio clip from his EuroOSCON keynote.