Superfreaconomics - a great RSA animation on the book by Levitt and Dubner, on altruism, fairness thieves etc.- on ultimatume games.
As a bonus: a "real" discussion with the authors:
Steven Levitt and Stephen J. Dubner (2009). Superfreakonomics: Global Cooling, Patriotic Prostitutes, and Why Suicide Bombers Should Buy Life Insurance. William Morrow/HarperCollins. ISBN 0060889578.