 Another striking fact about Kuhn’s last project is the demotion to “a historical perspective” of the history of science as a detailed source of data or phenomena upon which philosophers of science should draw. While Structure was already a curious mix of an inductive, history-based, bottom-up approach to modeling scientific development and a more formal, top-down approach based on Kuhn’s Kantianism (see below), he now concludes that his core position follows from first principles alone.