Thomas Aquinas: influences, peers and legacy

Every connection with its receipt

Thomas Aquinas built his synthesis out of Greek metaphysics, Arabic and Jewish commentary, and Neoplatonic mysticism, all absorbed in the Dominican studia of Cologne, Paris, Naples and Rome. This mix traces the texts he glossed line by line, the anonymous works he unmasked, the friars he argued with in the 1270 Paris crisis, and the poets and philosophers who carried Thomism forward.

The Kynda mix for Thomas Aquinas

• Key Influence · Nicomachean Ethics by Aristotle (c. 340 BC). Aquinas wrote a full line-by-line commentary on the Ethics (Sententia libri Ethicorum) using the Latin version prepared by his Dominican colleague William of Moerbeke. Aristotle's account of virtue, habit and eudaimonia is rebuilt wholesale in the Secunda Pars of the Summa Theologiae, where happiness becomes the beatific vision. Aquinas simply calls him 'the Philosopher'."} ->
• Influencia Obscura · Liber de Causis by Anonymous (Proclus tradition) (c. 9th century). Long circulated in medieval Paris as Aristotle's own theology, this Arabic Neoplatonic compilation shaped scholastic teaching on causal hierarchy and divine simplicity. Aquinas commented on it around 1272 and, comparing it with Moerbeke's fresh Latin Proclus, identified it as a derivative of the Elements of Theology rather than Aristotle — a rare piece of medieval source criticism.
• Local Roots · Itinerarium mentis in Deum by Bonaventure (1259). Born at Bagnoregio in central Italy, Bonaventure taught alongside Aquinas at Paris in the 1250s; both were finally admitted to the theology faculty in 1257 after the mendicant controversy. Where Aquinas builds an Aristotelian science, this Franciscan text maps a mystical ascent through creation to God, making it the clearest contrast within the same Italian-in-Paris generation.
• Beyond the Medium · Sainte-Chapelle by Pierre de Montreuil (1248). Consecrated in Paris a few years before Aquinas began lecturing there, this reliquary chapel is Rayonnant Gothic at its most systematic: structure reduced to armature, wall dissolved into ordered light. Aquinas's Summa was built in the same city under the same patron, Louis IX, at whose table he reportedly dined, and shares its logic of luminous, articulated hierarchy.
• Peer · On the Eternity of the World by Siger of Brabant (c. 1271). Siger led the radical Aristotelians in the Paris arts faculty whom Aquinas confronted during his second regency, 1268-72. Both were caught in Bishop Tempier's condemnations of 1270 and 1277. Aquinas argued that the world's beginning is known only by faith, not demonstrated — a position closer to Siger's philosophical caution than his Franciscan critics allowed.
• From the Canon · Summa Theologiae by Thomas Aquinas (1265-1274). Begun in Rome as a teaching text for Dominican students and left unfinished when Aquinas stopped writing in December 1273. Its question-and-article form — objections, sed contra, resolution, replies — is the mature scholastic instrument, moving from God through creation and human action back to God via Christ. Reginald of Piperno completed the last part from earlier writings.
• Key Collaborator · De animalibus by Albertus Magnus (c. 1260). Albert taught Aquinas at Paris and then Cologne from 1248, and reportedly defended his silent student as an ox whose bellowing would be heard everywhere. Albert's project of paraphrasing the whole Aristotelian corpus made Aquinas's synthesis possible; this vast zoological work, mixing Aristotle with his own field observation, shows the empirical appetite of the master.
• Legacy · The Divine Comedy by Dante Alighieri (1320). Dante places Aquinas among the twelve lights of the Sun in Paradiso X, where the Dominican praises Francis of Assisi and later names Siger of Brabant. Dante studied at the Dominican school of Santa Maria Novella in Florence, and the poem's moral architecture, its account of will and desire, and its theology of light are structured by Thomist categories.

What influenced Thomas Aquinas

• Aristotle (-384). States Thomas embraced Aristotle's ideas and synthesized them with Christian doctrine. (also via Summa Theologiae, Nicomachean Ethics) “It was at this university that Thomas was presumably introduced to Aristotle, Averroes and Maimonides, all of whom would influence his theological philosophy.” (Wikipedia)
• Averroes. Names Averroes as an influence encountered during Thomas's Naples education. (also via The Incoherence of the Incoherence) “It was at this university that Thomas was presumably introduced to Aristotle, Averroes and Maimonides, all of whom would influence his theological philosophy.” (Wikipedia)
• Albertus Magnus. Establishes Thomas's mentorship connection to Albertus Magnus in Paris and later Cologne. (also via De animalibus) “Thomas was sent to study at the Faculty of the Arts at the University of Paris, where he most likely met Dominican scholar Albertus Magnus” (Wikipedia)
• Maimonides. Names Maimonides as an influence encountered during Thomas's Naples education. “It was at this university that Thomas was presumably introduced to Aristotle, Averroes and Maimonides, all of whom would influence his theological philosophy.” (Wikipedia)
• Peter of Ireland. Peter of Ireland taught Thomas the Aristotle/Averroes commentaries. “Peter of Ireland was teaching the recently translated works of Aristotle as commented on by the Andalusian philosopher Averroes.” (Wikipedia)
• Avicenna. Explicitly states Avicenna's influence on Thomas's proof for God's existence. “Thomas was receptive to and influenced by Avicenna 's Proof of the Truthful.” (Wikipedia)
• Petrus de Ibernia. Identifies Petrus de Ibernia as Thomas's teacher of quadrivium subjects. “There, his teacher in arithmetic, geometry, astronomy, and music was Petrus de Ibernia.” (Wikipedia)
• Fons Vitae by Solomon ibn Gabirol. Fons Vitae (Solomon ibn Gabirol) — ghost for Thomas Aquinas “Thomas Aquinas opposed the teachings of Fons Vitæ; the Platonist Franciscans led by Duns Scotus supported its teachings, and led to its acceptance in Christian philosophy, influencing later philosophers such as the 16th-century Dominican…” (en.wikipedia.org)
• Nicomachean Ethics by Aristotle. Nicomachean Ethics (Aristotle) — titan for Thomas Aquinas “He embraced several ideas put forward by Aristotle and sought to synthesize Aristotelian philosophy with the principles of Christianity.” (en.wikipedia.org)
• The Divine Names by Pseudo-Dionysius the Areopagite. The Divine Names (Pseudo-Dionysius the Areopagite) — ghost for Thomas Aquinas “From that point until the Renaissance, the authorship was less questioned, though Thomas Aquinas, Peter Abelard and Nicholas of Cusa expressed suspicions about its authenticity; their concerns were generally ignored.” (en.wikipedia.org)
• The Incoherence of the Incoherence by Averroes. The Incoherence of the Incoherence (Averroes) — titan for Thomas Aquinas “It was at this university that Thomas was presumably introduced to Aristotle, Averroes and Maimonides, all of whom would influence his theological philosophy.” (en.wikipedia.org)
• Boethius. States Thomas's reliance on Boethius's thought regarding divine simplicity. “Thomas relied on Boethius who in turn followed the path of Platonism, something Thomas usually avoided.” (Wikipedia)
• Divine Comedy by Dante Alighieri. Thomas Aquinas is depicted as a glorified soul in Dante's Divine Comedy, showing his cross-medium influence on literature. “Dante Alighieri sees the glorified soul of Thomas in the Heaven of the Sun with the other great exemplars of religious wisdom.” (Wikipedia)
• Martin of Dacia. Biographer Tocco identifies Martin of Dacia as Thomas's teacher of grammar and logic. “Martin of Dacia was his teacher of grammar and logic.” (Wikipedia)
• Augustine of Hippo. Shows Thomas's definition of sin follows Augustine's formulation. “Following Augustine of Hippo, Thomas defines sin as "a word, deed, or desire, contrary to the eternal law."” (Wikipedia)
• Sainte-Chapelle by Pierre de Montreuil (1248). Sainte-Chapelle (Pierre de Montreuil) — culture for Thomas Aquinas (wikidata.org)
• Liber de Causis by Anonymous (Proclus tradition). Liber de Causis (Anonymous (Proclus tradition)) — ghost for Thomas Aquinas
• Scrovegni Chapel frescoes by Giotto (1305). Scrovegni Chapel frescoes (Giotto) — culture for Thomas Aquinas

Peers and kindred spirits

• Reginald of Piperno (1230). Reginald of Piperno served as Thomas's close associate and secretary. “he was with Thomas and his associate and secretary Reginald of Piperno as they left Viterbo on their way to Paris to begin the academic year” (Wikipedia)
• Saint Bonaventure. Thomas and Bonaventure lived and worked together as fraternal friends and fellow theology teachers. “From 1252 to 1257, Thomas lived and worked with Saint Bonaventure of Bagnoregio, of whom he became a fraternal friend.” (Wikipedia)
• Itinerarium mentis in Deum by Bonaventure (1259). Itinerarium mentis in Deum (Bonaventure) — geography for Thomas Aquinas “In 1255, along with Saint Bonaventure, he was involved in the dispute between secular masters and masters of the mendicant orders, with the former contesting the right to teach at the University of Paris.” (en.wikipedia.org)
• De animalibus by Albertus Magnus. De animalibus (Albertus Magnus) — collaborator for Thomas Aquinas “=== Paris, Cologne, Albert Magnus, and first Paris regency (1245–1259) === In 1245, Thomas was sent to study at the Faculty of the Arts at the University of Paris, where he most likely met Dominican scholar Albertus Magnus, then the hold…” (en.wikipedia.org)
• Opus Majus by Roger Bacon (1267). Opus Majus (Roger Bacon) — peer for Thomas Aquinas “== Legacy == Bacon was largely ignored by his contemporaries in favour of other scholars such as Albertus Magnus, Bonaventure, and Thomas Aquinas, although his works were studied by Bonaventure, John Pecham, and Peter of Limoges, through…” (en.wikipedia.org)
• Latin translation of Aristotle's Politics by William of Moerbeke. Latin translation of Aristotle's Politics (William of Moerbeke) — collaborator for Thomas Aquinas “His work is associated with William of Moerbeke's translations of Aristotle from Greek into Latin.” (en.wikipedia.org)
• On the Eternity of the World by Siger of Brabant. On the Eternity of the World (Siger of Brabant) — peer for Thomas Aquinas “Philosopher of religion Eleonore Stump says, "It has also been persuasively argued that Thomas Aquinas's De aeternitate mundi was directed in particular against his Franciscan colleague in theology, John Pecham." Thomas was deeply distur…” (en.wikipedia.org)
• On the Errors of the Greeks by Nicholas of Cotrone. On the Errors of the Greeks (Nicholas of Cotrone) — geography for Thomas Aquinas
• University of Paris. Documents Thomas's appointment as regent master of theology at the University of Paris.

Who Thomas Aquinas influenced

• Dante Alighieri (1265). Papal encyclical highlighted Dante's philosophical debt to Thomas Aquinas. (also via Summa Theologiae, The Divine Comedy, Divine Comedy) “highlighting the philosophical and theological debt of Dante versus Thomas Aquinas and thomism” (Wikipedia)
• Nicholas Brunacci. Brunacci studied under Thomas at Santa Sabina and Paris. “Dante corresponded with Dominican theologian Fr. Nicholas Brunacci (1240–1322), who had been a student of Thomas Aquinas at the Santa Sabina studium in Rome, later at Paris” (Wikipedia)
• Integral Humanism by Jacques Maritain (1936). Integral Humanism (Jacques Maritain) — legacy for Thomas Aquinas “Finnis (2011), in the Stanford Encyclopedia of Philosophy Thomistic Philosophy – Inspired by the enduring thought of Saint Thomas Aquinas Article on Thomism by the Jacques Maritain Center of Notre Dame University Thomistica.net news and …” (en.wikipedia.org)
• St. Thomas Aquinas: The Dumb Ox by G. K. Chesterton (1933). St. Thomas Aquinas: The Dumb Ox (G. K. Chesterton) — legacy for Thomas Aquinas “In my strange and clumsy way I was trying to say look it's all the same stuff." French philosopher Étienne Gilson praised Chesterton's book on Thomas Aquinas: "I consider it as being, without possible comparison, the best book ever writt…” (en.wikipedia.org)
• The Divine Comedy by Dante Alighieri (1320). The Divine Comedy (Dante Alighieri) — legacy for Thomas Aquinas “1321), Dante Alighieri sees the glorified soul of Thomas in the Heaven of the Sun with the other great exemplars of religious wisdom.” (en.wikipedia.org)
• Elizabeth Anscombe. Anscombe's work draws on and extends Thomas's principle of double effect. “Through the work of twentieth-century philosophers such as Elizabeth Anscombe (especially in her book Intention ), Thomas's principle of double effect specifically and his theory of intentional activity generally have been influential.” (Wikipedia)
• Tommasello da Perugia. Tommasello da Perugia was a student of Thomas at Santa Sabina. “Another student of Thomas's at the Santa Sabina studium provinciale was Blessed Tommasello da Perugia.” (Wikipedia)
• Philippa Foot (1920). Foot draws on Thomas's virtue ethics in her own ethical work. “Some modern ethicists within the Catholic Church (notably Alasdair MacIntyre ) and outside it (notably Philippa Foot ) have recently commented on the possible use of Thomas's virtue ethics” (Wikipedia)
• Umberto Eco (1932). Eco's semiotic/aesthetic work shows influence from Thomas's aesthetics. “The influence of Thomas's aesthetics can also be found in the works of the Italian semiotician Umberto Eco, who wrote an essay on aesthetic ideas in Thomas” (Wikipedia)
• James Joyce. Joyce's literary aesthetics were deeply influenced by Thomas's concept of claritas. “Thomas's aesthetic theories, especially the concept of claritas , deeply influenced the literary practice of modernist writer James Joyce, who used to extol Thomas as being second only to Aristotle among Western philosophers .” (Wikipedia)
• Alasdair MacIntyre (1929). MacIntyre draws on Thomas's virtue ethics in his own ethical work. “Some modern ethicists within the Catholic Church (notably Alasdair MacIntyre ) and outside it (notably Philippa Foot ) have recently commented on the possible use of Thomas's virtue ethics” (Wikipedia)
• Henry Adams (1813). Adams draws an analogy between Thomas's theological system and Gothic cathedral architecture. “Henry Adams 's Mont Saint Michel and Chartres ends with a culminating chapter on Thomas, in which Adams calls Thomas an "artist"” (Wikipedia)