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Greek Philosopher: Anaxagoras

Updated on April 1, 2009

Anaxagoras was a famous Greek philosopher and noted scientist of the Ionic School, among whose pupils were Socrates, Pericles and Euripides.

According to his explanation of the universe, the permanent elements of which it is constituted are unlimited in number, and are combined in bodies in changing proportions, as the result of a system of circulation directed by Spirit or Intelligence, a supreme independent force; he also explained solar eclipses.

500-428 BC

Born in 500 BC, the son of Hegesiboulis and native of Klazomenae in Thrace (near modern Izmir, Turkey), Anaxagoras was the first philosopher to make his home in Athens. There, as a friend of Pericles, Anaxagoras attracted the attention of men of scientific interests.

His most important contribution to philosophy was his doctrine of the origin of all things. He held that all matter had existed originally as atoms, or molecules; that these atoms, infinitely numerous and infinitesimally small, had existed from all eternity and that order was first produced out of this infinite chaos of minute atoms through the influence and operation of an eternal intelligence (nous). He also believed that all bodies are simply aggregations of atoms, for example, that a bar of gold, iron, or copper is composed of inconceivably minute particles of the same materials.

Anaxagoras marks a great turning point in the history of Greek philosophy. His doctrine of the nous was adopted by the Greek philosopher Aristotle; his doctrine of atoms prepared the way for the atomic theory of the Greek philosopher Democritus. Only fragments of Anaxagoras' most important work, On Nature, have survived.

In 434 BC the philosopher was tried for impiety, the charge being that he taught that the sun was a hot stone and the moon was earth. It is probable that the suit had political implications and that it was brought to embarrass Anaxagoras' patron, Pericles.

Forced to leave Athens, Anaxagoras lived in Lampsakos, where he established a school and where an altar was erected in his memory.

He is described by Aristotle as 'older in years, younger in works than Empedocles".


  • Pears Cyclopaedia, Twenty-Ninth Edition, 1926
  • Early Greek Philosophy, 4th Edition, 1964, Milton C. Nahm
  • New Encyclopedia, Volume 2, 1971, Funk & Wagnalls
  • The Standard English Desk Dictionary, Volume 1 A-L, Bay Books, 1983 


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      David99999 7 years ago

      Excellent essay. Thanks for writing this!

    • profile image

      SOMEONE 8 years ago


    • Lilymag profile image

      Lilymag 9 years ago from Upstate New York

      Thank you for another great history lesson in Greek Philosophy!

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      jedgrey 9 years ago

      Great hub. You've actually made history interesting! Keep up the good work

    • donnaleemason profile image

      donnaleemason 9 years ago from North Dakota, USA

      Fascinating. It is a shame that so much of historians work was destroyed. Makes me wonder how much further along we would be now if we had more of their theories to develop.