The medieval scholar who tried to solve physics with a mathematical error

Ideas & Philosophy · Published 3 October 2026 · Updated 25 October 2026 Swipe more like this →

In short: Thomas Bradwardine, known as the Profound Doctor, was a fourteenth-century polymath who attempted to reconcile Aristotelian physics with mathematics. By proposing a new law of motion, he inadvertently created a scientific framework that remained influential for over a century, despite being fundamentally incorrect in its underlying logic.

Born around 1295, Thomas Bradwardine rose from a fellow at Merton College, Oxford, to become the Archbishop of Canterbury in 1349. His intellectual life was defined by a desire to apply mathematical rigor to natural philosophy. In his 1328 treatise, De proportionibus velocitatum in motibus, he addressed the Aristotelian claim that velocity is proportional to the ratio of force to resistance. Bradwardine identified a contradiction: if resistance were to increase while force remained constant, the body should eventually stop, yet the existing mathematical rules suggested velocity would remain non-zero.

To resolve this, Bradwardine proposed that an arithmetic increase in velocity corresponds to a geometric increase in the force-to-resistance ratio. While this clever adjustment removed the immediate mathematical inconsistency, it was physically incorrect. Nevertheless, his work became a standard reference for mechanics for more than a century, influencing scholars like Oresme. His approach reflected a broader medieval effort to justify Aristotle’s observations through mathematical reinterpretation rather than outright rejection.

Beyond physics, Bradwardine was a formidable theologian and logician. He explored the liar paradox in his work on insolubles and argued that temporal intervals possess a first instant but no last one. His major theological contribution, De causa Dei contra Pelagium, treated divine providence with mathematical precision, advocating for a form of compatibilism where human actions align with God's absolute will. Though he died of the plague shortly after his consecration as Archbishop, his legacy as a bridge between scholastic theology and early mathematical physics remains a significant chapter in intellectual history.

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