Francisco Suárez (also called Doctor Eximius; 1548–1617) was a Spanish Jesuit theological philosopher. He taught mainly in Spain and Italy, at Salmanca, Rome, and Coimbra. He wrote On Law (1612), On the Trinity (1606), and On the Soul (1612). His best known work was his 54 arguments, or treatises, known as Metaphysical Disputations (1597), which were believed to have influenced Descartes, Leibniz, and Grotius in the seventeenth century, and Schopenhauer in the nineteenth. Suárez treated metaphysics in the first extended systematic way in the European tradition after Aristotle, which was not an Aristotelian commentary.