Friedrich Nietzsche was a ground-breaking thinker, who is still a force in the world today, despite a period in which he was discounted as the favourite theorist of the Nazis. He has been hailed as an anticipator of Freud, and he is often quoted by supporters of post-structuralism, as someone who saw systematization and pretensions to intellectual authority as veiled moves in a power game. His supporters dismiss his alleged validation of Nazism as a misunderstanding, largely fostered by his antisemitic sister Elizabeth, who edited his writings and inserted forged passages.