Payback: Why We Retaliate, Redirect Aggression, and Take Revenge

Strength Through Peace: How Demilitarization Led to Peace and Happiness in Costa Rica, and What the Rest of the World can Learn From a Tiny, Tropical Nation

Strength Through Peace: How Demilitarization Led to Peace and Happiness in Costa Rica, and What the Rest of the World can Learn From a Tiny, Tropical Nation

Gender Gap: How Genes and Gender Influence Our Relationships

How Women Got Their Curves and Other Just-So Stories: Evolutionary Enigmas