This research on religion by the greatest psychoanalyst of the twentieth century explores the role that faith can have in a person's life, what it can mean for us, and why as a species we are prone to it. Throughout history, certain books have changed the world. They have transformed the way we see ourselves – and each other. They have inspired controversy, opposition, war, and revolution. They have enlightened, enraged, provoked, and comforted. They have enriched lives – and destroyed them. Now, Penguin brings you the works of great thinkers, pioneers, radicals, and visionaries whose ideas shook civilization and helped shape us as we are.