An Archaeology of Disbelief traces the origin of secular philosophy to pre-Socratic Greek philosophers who proposed a physical universe without supernatural intervention. Some mentioned the Homeric gods, but others did not. Atomists and Sophists identified themselves as agnostics if not outright atheists, and in reaction Plato featured transcendent spiritual authority. However, Aristotle offered a physical cosmology justified by evidence from a variety of scientific fields. He also revisited many pre-Socratic assumptions by proposing that existence consists of mass in motion without temporal...