Friedrich Nietzsche (1844–1900)

Friedrich Nietzsche was a German philosopher of the late 19th century who challenged the foundations of Christianity and traditional 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 his philosophy is the idea of “life-affirmation,” which involves an honest questioning of all doctrines that drain life's energies, however socially prevalent those views might be. Often referred to as one of the first existentialist philosophers, Nietzsche's revitalizing philosophy has inspired leading figures in all walks of cultural life, including dancers, poets, novelists, painters, psychologists, philosophers, sociologists and social revolutionaries.

From Stanford Encyclopedia of Philosophy

See also wikipedia