Harvard evolutionary psychologist and linguist Steven Pinker has always been deeply curious about how humans work. In a series of best-selling books, he has argued that our mental faculties — from emotions to decision-making to visual cognition — were forged by natural selection.
In his newest book, The Better Angels of Our Nature, Pinker investigates one of the most primal apects of life: Violence. He argues that violence has fallen drastically over thousands of years — whether one considers homicide rates, war casualties as a percentage of national populations, or other measures.