The Synthesis and Its Inward Fault

The third volume opens where the second closed, but it opens by looking backward with unusual candor. Copleston characterizes the thirteenth century as the age of a synthesis — reason and faith, philosophy and theology held in harmony, the mind credited with power to transcend appearances and reach metaphysical truth. Thomas, Bonaventure, Giles of Rome, Henry of Ghent, and Scotus disagreed within that frame; none doubted the frame itself. Yet Copleston insists the harmony was, from the practical standpoint, precarious, and that elements internal to the Thomist achievement helped explain what came after. This is the volume’s governing thesis in miniature: the fourteenth century is not decadence visited on the schools from outside but a working-out of tensions already present. The narrative that follows — the least familiar stretch of the whole series — earns its drama from that premise. The cathedral does not fall to siege; it settles along its own hidden fault.

Ockham and the Fourteenth-Century Turn

William of Ockham is the volume’s opening protagonist, expounded across six chapters with the source-fidelity Copleston gives every major figure. The razor — the principle of economy — is the least of it. More consequential is the terminist logic and the reduction of universals to names, which severs the metaphysic of essences that the previous volume had made load-bearing. Alongside it runs the theology of divine omnipotence: God’s absolute power, the potentia absoluta, outruns every apparent necessity, so that the world-order is radically contingent and God could even cause an intuitive knowledge of a non-existent object. From these premises the demonstrable reach of reason contracts. Copleston reports Ockham’s conclusion that the soul’s immateriality and immortality cannot be philosophically proved, and traces the emphasis on freedom into an ethics whose two strands Copleston reads — by his own account in the Foreword, conjecturally, and against Father Boehner’s demurral — as standing in some tension. The Ockhamist movement extends the corrosion: John of Mirecourt, Nicholas of Autrecourt, nominalism spreading through the universities. Two neighboring chapters keep the century from flattening into mere skepticism. The scientific movement — the impetus theory, Nicholas Oresme entertaining the earth’s rotation and the possibility of other worlds — shows nominalism’s loosening of necessity opening room for hypothesis; Marsilius of Padua’s Defensor pacis prosecutes the case against papal claims in political theory; and the speculative mystics, Eckhart and Tauler among them, pursue an interior route to God that the collapse of natural theology had, in its way, left open.

The Renaissance Taken Seriously

Against the cliché of a philosophical vacancy between Scholasticism and Descartes, the middle chapters recover a crowded scene. The revival of Platonism centers on the Platonic Academy of Florence, founded under Cosimo de’ Medici and stirred by the arrival of George Gemistus Plethon from Byzantium; Pico della Mirandola receives the fullest treatment. Nicholas of Cusa is given his own chapter — the learned ignorance of the docta ignorantia, the coincidence of opposites, the infinity of the world, man as microcosm. The nature-philosophers follow: Cardano, Telesio, Patrizzi, Campanella, and Bruno with his infinite universe, along with the theosophical and magical current of Agrippa, Paracelsus, and Jakob Böhme. Copleston’s treatment is characteristically sober — the hermetic and magical strands are registered without either mockery or enthusiasm — which makes the chapters a reliable baseline for readers whose interest in the period arrives by this library’s other route, the depth-psychological recovery of Renaissance imagination. Here is what the sources say those movements taught, before psychology retells them. The Renaissance section also carries a full political philosophy — Machiavelli, More, Hooker, Bodin, Althusius, Grotius — and Francis Bacon, whose classification of the sciences, program of induction, and doctrine of the idols (of the tribe, the cave, the market-place, and the theatre) reorient knowledge from contemplation toward power over nature.

The Iberian Second Summer

The volume’s most distinctive service is its long account of the Scholasticism of the Renaissance — the revival running through Cajetan and the Dominican and Jesuit schools, the controversy over grace and free will, the shift from commentaries on Aristotle toward independent philosophical courses, and the international-law thought of Francis of Vitoria. It culminates in Francisco Suárez, whose Disputationes metaphysicae Copleston expounds at a depth rare in any English survey: metaphysics as the science of being, the concept and attributes of being, individuation, analogy, essence and existence, and then the great philosophy of law — the distinction of lex from ius, the natural law and the law of nations, the contract theory of political society, the conditions of just war, and the deposition of tyrants. The historical point is quietly decisive. The Disputationes, Copleston records, penetrated the Protestant universities of Germany and served as a textbook of philosophy across many of them into the seventeenth century and part of the eighteenth. When Descartes and Leibniz later argue about substance and essence, the terms arrive pre-packed by the Iberian schools. The continuity thesis of the series earns its keep: the modern break with the schools was conducted, at first, in the schools’ own language.

The Hinge, Rightly Placed

It is tempting to end the volume on Bacon, and the series’ back matter encourages it, subtitling this book Ockham, Francis Bacon, and the Beginning of the Modern World. But Bacon sits in the middle of the Renaissance chapters, not at the close; the terminal substance is Suárez, followed by a retrospective review of the first three volumes. That review is where Copleston places the true hinge. The rise of science, he argues, redirected thought and, once philosophers ceased to be primarily theologians, made explicit a tension between philosophy and theology that had lain in germ. And the questions this raises — whether there is such a thing as a valid metaphysical argument, whether metaphysics can bridge faith and scientific knowledge — return the reader precisely to the fourteenth century. In this sense, Copleston writes, one is back in the situation created by the nominalist criticism of traditional metaphysics, though the problem is clearer now than it was then. As shelf material the volume gives this library its connective tissue between medieval interiority and modern subjectivity; as series architecture it does something more exact than open the door to the rationalists. It shows that the door was cut by Ockham, and that the question framed on its threshold is still ours.