Anaxagoras wrote only one book and he was mainly influenced by the theories of Parmenides. However, his own theory was a reaction to the Eleatic monism.
According to Anaxagoras, in the beginning, everything existed in infinitely small fragments and infinite numbers in such a small place and such proximity that they were almost indiscernible. The re-arrangement of these fragments was orchestrated by the cosmic mind which he called Nous.
Anaxagoras spend a good part of his life teaching in Athens. Like Socrates, he was one of the Greek philosophers to undergo a trial for their ideas. The Ath