Who advocated a new order in France based solely on mans reason?

The Enlightenment philosopher René Descartes is often credited with advocating for a new order in France based on human reason. His emphasis on rational thought and skepticism of traditional beliefs laid the groundwork for a shift towards reason as the foundation for knowledge and governance. This approach significantly influenced later thinkers and the development of Enlightenment ideals, which sought to reform society through reason and empirical evidence.