After kicking open the doors to twentieth-century philosophy in Thus Spake Zarathustra, Friedrich Nietzsche refined his ideal of the superman with the 1886 publication of Beyond Good and Evil. Conventional morality is a sign of slavery, Nietzsche maintains, and the superman goes beyond good and evil in action, thought, and creation. Nietzsche especially targets what he calls a "slave morality" that fosters herdlike quiescence and stigmatizes the "highest human types."In this pathbreaking work, Nietzsche's philosophical and literary powers are at their height: with devastating irony and flashing wit he gleefully dynamites centuries of accumulated conventional wisdom in metaphysics, morals, and psychology, clearing a path for such twentieth-century innovators as Thomas Mann, André Gide, Sigmund Freud, George Bernard Shaw, André Malraux, and Jean-Paul Sartre, all of whom openly acknowledged their debt to him.