Beyond Good and Evil (German: Jenseits von Gut und Böse), subtitled 'Prelude to a Philosophy of the Future' (Vorspiel einer Philosophie der Zukunft), is a book by the German 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 attacks past philosophers for their alleged lack of critical sense and their blind acceptance