What Do You Believe Author:DK Publishing What do you believe? Do you know why you believe what you do? — What Do You Believe? introduces readers to the many religions of the world and its equally numerous philosophies, from global religions such as Christianity, Judaism, Islam, and Buddhism, to lesser-known faiths, and from ancient philosophers such as Socrates, Aristotle, and Plato, to... more » modern thinkers such as Kierkegaard, Nietzsche, Kant, and Sartre.« less