One of the world's most influential thinkers, Friedrich Nietzsche lived from 1844 to 1900. This classic portrait by an unidentified photographer, captures his spirit and intensity very well.
Nietzsche challenged the foundations of the very Christianity of his parents (he was raised Lutheran). He also challenged traditional morality. Known as one of the first existential philosophers, he was concerned with the power of the individual and the world that we live in - rather than the uncertain other world beyond.
Quite popular with the avant garde, Nietzsche felt that we should all honestly question those standard parts of life that drain our energies - no matter how popular and prevalent those doctrines and practices might be.