Few political thinkers have left behind a quote as unsettling as this one. At first glance, it appears simple. On closer inspection, it challenges one of the most common assumptions about evil: That terrible acts are mainly committed by obviously wicked people.For Hannah Arendt, one of the twentieth century's most influential political theorists, the greater danger often came from ordinary individuals who stopped thinking critically about their actions and responsibilities.Who was Hannah Arendt?Hannah Arendt (1906-1975) was a German-born Jewish political theorist who later became an American citizen. She was forced to flee Nazi Germany and eventually settled in the United...