Archelaus (philosopher) Archelaus (philosopher) Archelaus (; ; fl. 5th century BCE) was an Ancient Greek philosopher, a pupil of Anaxagoras, and may have been a teacher of Socrates. He asserted that the principle of motion was the separation of hot from cold, from which he endeavoured to explain the formation of the Earth and the creation of animals and humans. Archelaus was a philosopher of the Ionian School, called "Physicus" from having been the first to teach natural philosophy at Athens. This statement of Diogenes Laërtius, is contradicted by Clement of Alexandria, but the two may be reconciled by supposing that Archelaus
Alcinous (philosopher) Alcinous (philosopher) Alcinous (Greek: "Alkinoos") was a Middle Platonist philosopher. He probably lived in the 2nd century AD, although nothing is known about his life. He is the author of "The Handbook of Platonism", an epitome of Middle Platonism intended as a manual for teachers. He has, at times, been identified by some scholars with the 2nd century Middle Platonist Albinus. Alcinous is the author of work called "The Handbook of Platonism" (, also ; ), one of the few surviving works from the Middle Platonist period (c. 90 BC – 250 AD). The book contains 36 chapters which cover