Vacuum Genesis and Spontaneous Emergence of the Universe from Nothing in Reference to the Classical Notion of Causality and Creation ex nihilo *

The article addresses philosophical and theological reflections inspired by the cosmological models of the origin of the universe from the quantum vacuum (through quantum tunneling) and through a spontaneous emergence from an a-temporal initial state of non-being. A thesis about the possibility of cosmogenesis ex nihilo without the need of God the creator—inspired by these models—is put into question. Its philosophical and theological presuppositions are verified in reference to the classical thought of Aristotle and Aquinas and the categories of potency and act, causality and chance, and metaphysically defined nothingness.