Pythagoras has a detailed philosophical enterprise which is compiled on a published book.

Thales of Miletus was the first one to deviate from the mythological tradition and believed that moist is the essence of all matter.

Democritus explained that space has a Being to be considered non-existent which accounts for the world's changing physical phenomena.

Epicurus has conceived a naturalistic account of evolution.

Scholasticism remains fixed in religious principles and Christian dogmas.

Aristotle heavily influenced Aquinas regarding metaphysics of our origin and personalities.

In his epistemology, Bonaventure thought that the Divine is the source of knowledge.

William of Ockham argued that it is impossible to deny the existence of God, both in faith and in reason.

Sant' Anselmo D' Aosta believed that there is no being that can be considered great enough to be able to replace God.