... could evolve. With this work, the idea of skepticism was revived from the ancients such as Sextus Empiricus and modified to account for a truth that Descartes found to be incontrovertible. Descartes started his line of reasoning by doubting everything, so as to assess the world from a fresh perspective, clear of any preconceived notions....

...After several years working on a treatise putting forth his mechanistic philosophy and physics, Descartes shelved the project when his contemporary, Galileo, was charged with heresy. That work, The World, was only published after Descartes’ death. It seems that Descartes must have had this, in part at least, in mind whe...