- René Descartes (/deɪˈkɑːrt/ or UK: /ˈdeɪkɑːrt/; French: [ʁəne dekaʁt]; Latinized: Renatus Cartesius; 31 March 1596 – 11 February 1650) was a French philosopher, scientist, and mathematician, widely considered a seminal figure in the emergence of modern philosophy and science. Mathematics was central to his method of inquiry, and he connected the previously separate fields of geometry and algebra into analytic geometry. Descartes spent much of his working life in the Dutch Republic, initially serving the Dutch States Army, later becoming a central intellectual of the Dutch Golden Age. Although he served a Protestant state and was later counted as a deist by critics, Descartes considered himself a devout Catholic.
- Thomas Jefferson (plato.standford.edu)
Scholars in general have not taken seriously Thomas Jefferson (1743–1826) as a philosopher, perhaps because he never wrote a formal philosophical treatise. Yet Jefferson was a prodigious writer, and his writings were suffuse with philosophical content. Well-acquainted with the philosophical literature of his day and of antiquity, he left behind a rich philosophical legacy in his declarations, presidential messages and addresses, public papers, numerous bills, letters to philosophically minded correspondents, and his only book, Notes on the State of Virginia.