Cosmological Argument

The cosmological argument is an argument for the existence of a First Cause (or instead, an Uncaused cause) to the universe, and by extension is often used as an argument for the existence of an "unconditioned" or "supreme" being, usually then identified as God. It is traditionally known as an argument from universal causation, an argument from first cause, the causal argument or the argument from existence. Whichever term is employed, there are three basic variants of the argument, each with subtle yet important distinctions: the arguments from in causa (causality), in esse (essentiality), in fieri (becoming), and the argument from contingency.

The basic premise of all of these is that something caused the Universe to exist, and this First Cause is what we call God. It has been used by various theologians and philosophers over the centuries, from the ancient Greeks Plato and Aristotle to the medievals (e.g., St. Thomas Aquinas) and beyond. It is also applied by the Spiritist doctrine as the main argument for the existence of God.