Monism
Neoplatonism, founded by Plotinus (c. 205–271), flourished in the academies of Alexandria and Athens until the sixth century. In the fifteenth century Gemistos Plethon of Mystras drew on it in a pagan revival.
His Nomoi rejected Christianity for the worship of the Hellenic gods under Zeus, whom he saw as universal principles and planetary powers. After his death the work reached Patriarch Gennadius II, who burned it in 1460.