From Steven Weinberg’s “Without God” (The New York Review of Books: 25 September 2008):
It has often been noted that the greatest horrors of the twentieth century were perpetrated by regimes – Hitler’s Germany, Stalin’s Russia, Mao’s China – that while rejecting some or all of the teachings of religion, copied characteristics of religion at its worst: infallible leaders, sacred writings, mass rituals, the execution of apostates, and a sense of community that justified exterminating those outside the community.