This post sketches out the rough outline of Jerome Zanchi’s understanding of natural law. An interesting difference between Zanchi and Martyr is that Thomistic elements are far more important in Zanchi’s theology than in Martyr’s theology.
The historian John Patrick Donnelly thinks Zanchi is the best example of “Calvinist Thomism,” meaning a theologian who was Reformed in theology and Thomistic in philosophy and methodology. Zanchi was born and raised near Bergamo where he entered the Augustinian Canons and received a Thomistic training. Martyr was his prior at Lucca and was instrumental in his conversion to Protestantism. Zanchi spent ten years as a Nicodemite, or crypto-Calvinist, teaching theology before fleeing north to Geneva in 1552, where he studied for a year under Calvin. Later he served as professor of theology at Strasbourg, Heidelberg, and Neustadt until his death in 1590. After his death his relatives gathered most of his writings into his Opera in eight large tomes, which went through three editions. In all, there were about seventy printings of his writings. (See John Patrick Donnelly, “Calvinist Thomism,” Viator 7 (1976): 444).
Zanchi planned a great Protestant “summa” modeled after Thomas’ Summa theologica. According to Donnelly, the first four volumes of Zanchi’s Opera, which appeared under separate titles as he finished them at Heidelberg, cover the same material at twice the length as the first half of Thomas’s Summa. Even though Zanchi never completed his “summa,” it is unrivaled for thoroughness and synthetic power in sixteenth-century Protestant theology. (See Donnelly, “Calvinist Thomism,” 444).
Zanchi begins his analysis of natural law by noticing that canon lawyers and theologians restrict their idea of natural law to human nature, defining it as “the law common to all nations and that’s obeyed everywhere by natural instinct not by any statue.” Civil lawyers also use this definition for the law of nations because all people employ these laws and are led by them. Examples of such laws include statues concerning God, public worship, religion, obedience to superiors and the state, and defense of oneself, one’s family, and the state. Read more on The Catholicity of the Reformation: Musings on Reason, Will, and Natural Law, Part 6…