Philosophy in the Tragic Age of the Greeks (German: Philosophie im tragischen Zeitalter der Griechen) is an incomplete book by Friedrich Nietzsche. He had a clean copy made from his notes with the intention of publication. The notes were written around 1873. In it he discussed five Greek philosophers from the sixth and fifth centuries BC. They are Thales, Anaximander, Heraclitus, Parmenides, and Anaxagoras. He had, at one time, intended to include Democritus, Empedocles, and Socrates. The book ends abruptly after the discussion of Anaxagoras's cosmogony.
Nietzsche stated that he wanted to present the outlooks of very worthy individuals who originated in ancient Greece from 600 BC to 400 BC. "The task is to bring to light what we must ever love and honor...." Nietzsche wanted future humans to be able to say, "So this has existed – once, at least – and is therefore a possibility, this way of life, this way of looking at the human scene."
By selecting only a few doctrines for each philosopher, Nietzsche hoped to exhibit each philosopher's personality.
This philosopher proposed that water is the origin of all things. Nietzsche claimed that this must be taken seriously for three reasons.
Thales' generalization was the result of creative imagination and analogy. He did not use reason, logical proof, myth, or allegory. This was a first attempt to think about nature without the use of myths about gods. However, instead of trying to gain knowledge of everything, he wanted to know the one important common property of all things.