Beyond Good and Evil (German: Jenseits von Gut und Böse; subtitled "Prelude to a Philosophy of the Future" (German: Vorspiel einer Philosophie der Zukunft)) is a book by the philosopher Friedrich Nietzsche, first published in 1886. It takes up and expands on the ideas of his previous work,

Thus Spoke Zarathustra, but approached from a more critical, polemical direction. In Beyond Good and Evil, Nietzsche accuses past philosophers of lacking critical sense and blindly accepting Judeo-Christian premises in their consideration of morality.

The work moves into the realm "beyond good and evil" in the sense of leaving behind the traditional morality which Nietzsche subjects to a destructive critique in favour of what he regards as an affirmative approach that fearlessly confronts the perspectival nature of knowledge and the perilous condition of the modern individual.