Joseph Albo c. 1380 – 1444

Joseph Albo was a Spanish Jewish philosopher and the author of the Sefer ha-Ikkarim, the Book of Principles, the most widely read Jewish philosophical work in Iberia in the generation before the expulsion. Drawing on Maimonides, Crescas, and his teacher Hasdai Crescas, he organized Jewish religious belief around three roots: the existence of God, revelation, and reward. He participated as a representative of his community in the disputation of Tortosa in 1413, one of the major forced public debates of the late medieval Iberian Jewish experience.