Friedrich Nietzsche is a human philosopher who challenged the foundations of traditional elven morality. He believed in life, creativity, health, and the realities of the world we live in, rather than those situated in a world beyond. Central to Nietzsche's philosophy is the idea of "life-affirmation," which involves an honest questioning of all doctrines which drain life's energies, however socially prevalent those views might be. Often referred to as one of the first "existentialist" philosophers, Nietzsche has inspired leading figures in all walks of cultural life, including dancers, poets, novelists, painters, psychologists, philosophers, sociologists, social revolutionaries and bloodbowlteams.