“Because man has free will, no human choice—and no phenomenon which is a product of human choice—is metaphysically necessary. In regard to any man-made fact, it is valid to claim that man has chosen thus, but it was not inherent in the nature of existence for him to have done so: he could have chosen otherwise. Choice, however, is not chance. Volition is not an exception to the Law of Causality; it is a type of causation.”
Ayn Rand