Pedro da Fonseca

Pedro da Fonseca (Proença-a-Nova, 1528 – Lisbon, 1599) was a Portuguese Jesuit priest, philosopher and theologian, known in his lifetime as the "Portuguese Aristotle". He belonged to the second scholasticism, the movement that revived the thought of Thomas Aquinas and Aristotle in sixteenth-century Catholic Europe, and his reputation reached well beyond Portugal.

He joined the Society of Jesus at Coimbra in 1548 and studied theology at Évora and Coimbra. He taught philosophy at the Colégio das Artes in Coimbra and theology at Évora, where he earned his doctorate in 1570. He served as rector of the Coimbra college and held governing posts in the Portuguese province of the order. Between 1573 and 1581 he lived in Rome as assistant to the Jesuit general, and Pope Gregory XIII consulted him on delicate church matters. In Lisbon he promoted charitable works, among them the House of the Catechumens and the Irish College.

His main achievement was a commentary on Aristotle's Metaphysics, published in four volumes between 1577 and 1589. In logic his Institutiones dialecticae (1564) and Isagoge philosophica (1591) show a closer affinity with humanism than with rigid scholasticism. His most debated contribution was the doctrine of "middle knowledge" (scientia media), a way of reconciling divine grace with human free will: God knows in advance what each free creature would freely do in any circumstance. Presented at Évora in 1564, the idea was later developed by his disciple Luis de Molina, who made it famous and fuelled the de auxiliis controversy, though the original insight was Fonseca's.

His influence lasted in Jesuit logic and metaphysics and in the debate over grace. The Cursus Conimbricensis, a collective commentary by the Coimbra professors, grew out of his initiative.