Who wanted to prove the world wasn't flat?

Throughout history, various thinkers and explorers have sought to prove that the Earth is round rather than flat. Notably, ancient Greek philosopher Pythagoras is often credited with the early idea of a spherical Earth, while later figures like Aristotle and Eratosthenes provided further evidence through observations and measurements. In the Age of Exploration, figures like Ferdinand Magellan, whose expedition circumnavigated the globe, provided practical proof of the Earth's roundness.