Who proposed geocentrism?

Geocentrism was first formally proposed by ancient Greek philosophers who sought to explain the observed motions of the heavens in a rational, mathematical way. Earlier cultures already assumed the Earth's centrality, but figures like Pythagoras, Eudoxus, and Aristotle gave that intuition philosophical form. Aristotle (4th century B.C.) argued that the Earth, composed of the heaviest element, naturally occupied the universe's center. Around 150 A.D., Claudius Ptolemy developed the Almagest, a mathematical system of deferents and epicycles that successfully predicted planetary motion for over a millennium. The Church Fathers later endorsed this framework because it aligned with both Scripture and observation. St. Basil, St. Ambrose, and St. John Chrysostom spoke of the Earth as fixed and the heavens in motion. When Christianity absorbed Greek cosmology, it refined geocentrism within a theological framework: the universe was not random but designed, with man at the center of divine providence. (See Galileo Was Wrong, Vol. 1, ch. 3.) So geocentrism was proposed by those who combined empirical experience, philosophical reasoning, and theological insight. It remained the dominant scientific paradigm until the early modern period because it accounted for the data far better than its challengers, right up until new instruments emerged. (Geocentrism 101, ch. 2.) Geocentrism's formal proposal can be traced through several stages of intellectual development. The pre-Socratics observed celestial order and sought natural causes. Pythagoras and his followers imagined a spherical Earth at the center, surrounded by concentric spheres of the heavenly bodies producing "the harmony of the spheres." Eudoxus of Cnidus (4th century B.C.) introduced the first geometric model capable of describing the complex retrograde motions of planets by nesting rotating spheres. Aristotle then synthesized these models into a comprehensive cosmology. His argument was metaphysical as well as physical: all motion requires a prime mover, and the natural state of the heaviest body, the Earth, is rest at the center of the cosmos. (GWW, Vol. 1, pp. 47-60.) Aristotle's reasoning remained unchallenged for nearly 500 years, until Ptolemy, building on Hipparchus, produced a computational system that matched observation with mathematical precision. The Ptolemaic model did not arise from religious prejudice. It arose from methodical astronomy, and it predicted planetary positions accurately enough to serve navigation and calendar reform for centuries. Contrary to the modern caricature, this was not "anti-science." It was the scientific consensus of its age. (Geocentrism 101, pp. 33-42.) When the early Church inherited this system, it saw no conflict between revelation and empirical astronomy. In Scripture the cosmos is depicted as ordered and hierarchical. The sun, moon, and stars "move" across the firmament, while the Earth "shall not be moved" (Ps 93:1). The Fathers interpreted these statements literally, yet reverently. St. Basil, in his Hexaemeron, writes: "The Earth is at rest, a sure foundation beneath the heavens." St. John Chrysostom echoes him: "The Earth stands immovable, and the heavens revolve around it." (GWW, Vol. 1, pp. 120-132.) Geocentrism's proposal, then, was not the invention of one man but the convergence of observation and revelation. The Greeks provided the logical scaffolding; Christianity supplied the metaphysical grounding. The synthesis stood unbroken until the sixteenth century, when Copernicus suggested that heliocentrism might yield simpler calculations. Yet Copernicus himself conceded that his model was only a hypothesis. Even into the seventeenth century, Tycho Brahe proposed a geo-heliocentric model, with the planets orbiting the sun while the sun orbited Earth, precisely because the observational data still favored the Earth's stability. In modern physics, the principle of relativity has restored a kind of vindication to the ancient proposal. If motion is relative, then one may describe the universe as revolving around a fixed Earth with equal validity. This is not anachronistic nostalgia. It is a recognition that the geocentric proposal remains physically tenable within a Machian framework, something Einstein's own relativity admits. Those early philosophers who proposed geocentrism were not naïve. They articulated a principle that remains scientifically coherent and theologically profound. (GWW, Vol. 2, ch. 5.)