Sam Harris, the philosopher and neuroscientist, blew my mind with the clarity of his explanation on his Making Sense podcast: We imagine that people everywhere, at bottom, want the same things: They want to live safe and prosperous lives. They want clean drinking water and good schools for their kids. And we imagine that if whole groups of people start behaving in extraordinarily destructive ways, practicing suicidal terrorism against noncombatants, for instance,
