Can human beings determine their own destiny, or are we the inevitable product of our environment and nature? Sam Harris is convinced that free will is an illusion. After all, if the world is just matter and motion, how could there be free will? Not everyone agrees with Harris, however, and many thinkers see free will as a self-evident axiom on which morality is based. The question of free will is one that every serious thinker must consider, and for Tolstoy, this is an essential prerequisite for the question of human motivation and therefore the cause and direction of history.