Macgregor’s monograph on the scholastic theologian Luis de Molina (1535-1600) and his thought offers ample testimony of the revival – especially since the 1980s - of scholarly interest on the Spanish Jesuit as a major ecumenical philosopher of God’s omniscience and the problem of moral freedom. In particular, it offers testimony of the enduring interest of his famous thesis of “middle knowledge”, which allows for God’s foreknowledge of counterfactuals in relation to the free choice of all human beings in the face of their acceptance or the their rejection of faith. Middle knowledge stands logically (not temporally) between God’s “natural” knowledge of necessary truths and his “free” knowledge of actual contingencies in the created world. He...