I’m at the Tuol Sleng Genocide Museum in Phnom Penh, Cambodia. The museum was originally a school in the middle of the city that was converted into a notorious torture prison by the communist Khmer Rouge in 1976. The Khmer Rouge pursued a radical communist revolution in which private property and money were abolished. Families were forcibly broken up, and millions of people were forced into hard labor and work collectives. Those labeled enemies of the revolution were imprisoned and killed. Their family members were not spared. Spouses and children were also killed to prevent surviving relatives from seeking revenge. Some 18,000 people passed through this one prison, where prisoners were bru…