How did Aristotle's idea of the unmoved mover influence later philosophy of religion?

Aristotle’s concept of the unmoved mover profoundly shaped the philosophy of religion by providing a foundational framework for natural theology, most notably through the work of St. Thomas Aquinas.12

Aquinas integrated Aristotelian metaphysics into Christian thought, specifically utilizing the unmoved mover as the basis for the first of his Five Ways—the argument from motion. While Aristotle envisioned the unmoved mover as a final cause—an object of love that inspires the eternal motion of the heavens—Aquinas transformed this concept. He identified Aristotle’s prime mover with the personal, creative God of Judaism and Christianity.3145

By adopting Aristotle’s logic, Aquinas argued that finite processes require an unconditioned ground or first cause to avoid an infinite regress. This synthesis allowed medieval thinkers to reconcile reason with faith, positioning God as the necessary, transcendent reality that sustains the existence of all contingent beings. Consequently, Aristotle’s causal hierarchy became a cornerstone for demonstrating divine existence within Western intellectual history.3142