Entry 0222: Aquinas’ Five Ways and Aristotle (I)
It is generally accepted that Aquinas' Five Ways of proving the existence of God have their ultimate source in Aristotle. Aquinas is not the originator of the arguments. See Leo J. Elders, The Philosophical Theology of St. Thomas Aquinas, (Leiden, The Netherlands: E. J. Brill, 1990), 83-126.