Fairness versus Reason in the Ultimatum Game
The Company of Strangers : A Natural History of Economic Life
The nature of human altruism
Social play behaviour. Cooperation, fairness, trust, and the evolution of morality

The Extended Organism: The Physiology of Animal-Built Structures
Moral Calculations: Game Theory, Logic, and Human Frailty
Thought Contagion: How Belief Spreads Through Society
Virus Dynamics: Mathematical principles of immunology and virology