The recent scholarly promotion of Pierre Gassendi to a key position in the formative modern period raises doubts about the portrayal of Descartes as “the father” of the post-Scholastic philosophical conceptualization. I defend the Cartesio-centric account against Thomas M. Lennon’s elliptical alternative. The defense necessitates a reassessment of the root nature of Descartes’s contribution—specifically of the interplay between philosophy and science, the latter being the crucial extraphilosophical component of the new practico-cognitive ensemble . This raises questions about the “philosophically” of Descartes’s activity, and with that questions about the quality of modernity. By way of explaining Gassendis nonoriginative position, his attitude toward the post-Scholastic Humanist thought that Descartes simply repudiated is examined.