Editorial biography
James Hartle (1939-2023) was an American theoretical physicist and cosmologist whose work, while primarily focused on quantum gravity and cosmology, had significant implications for philosophical and theological discussions about the origin and nature of the universe. Best known for his collaboration with Stephen Hawking on the Hartle-Hawking no-boundary proposal (1983), which suggested the universe has no temporal boundary or beginning in the conventional sense, Hartle's work challenged traditional cosmological arguments for God's existence that relied on the universe having a definite beginning. His contributions to quantum cosmology, including work on the wave function of the universe and time's emergence from timelessness, provided naturalistic frameworks for understanding cosmic origins that influenced debates between theistic and atheistic interpretations of modern cosmology. Though not primarily a philosopher of religion, Hartle's scientific work significantly impacted contemporary discussions about creation, divine action, and the relationship between physics and metaphysics.