That's not modernism though. As far back as Aquinas and even earlier we have known that it is possible to arrive at the idea of God as well as Ultimate Nature of Things using reason alone, so there's nothing modernist or even Enlightenment-era about that. Modernism is a specific cultural movement that took root in the early 20th century, building on prior movements before that. It can be seen in rejection of classical arts replaced by Cubism and other abstract monstrocities... in the rejection of classical architecture replaced by 'modernism' proper but ultimately by 'post-modernism' now with its zig-zag buildings that have no shape or form. A new type of literature called 'modernist' literature such as e.g. Joyce began to replace the classic writers such as Dumas and Conan Doyle. At the heart of modernism was a desire for a wholesale rejection of anything that could be termed traditional in European culture, fueled by the fumes of the Industrial Revolution which promised that eternal incrementality would be forever possible, and during every Tomorrow, everything that was good Today could be considered Obsolete.