This contribution proposes an interpretation of Thomas Aquinas’s philosophy of mathematics. It is argued that Aquinas’s philosophy of mathematics is a coherent view whose main features enable us to understand it as a moderate realism according to which mathematical objects have an esse intentionale. This esse intentionale involves both mathematicians’ intellectual activity and natural things being knowable mathematically. It is shown that, in Aquinas’s view, mathematics’ constructive part does not conflict with mathematical realism. It is also held that mathematics’ imaginative reasoning is coherent with Aquinas’s doctrine of formal abstraction and his realistism. It focuses on some of Aquinas’s texts, which it places within their textual and doctrinal context and interprets them in the light of some historical elements.

Much has been written of John Courtney Murray’s reception of Thomas Aquinas. Although not totally misplaced, this near-exclusive attention to Aquinas’s role in Murray’s thought has obscured the contributions of an equally important figure—Augustine of Hippo—to Murray’s political theology. This article thus offers a novel survey of Murray’s seminal We Hold These Truths and reveals that Augustine’s theory of Divine Providence, as articulated in The City of God, circumscribed Murray’s Thomism. With the hope of reconciling differences between American Catholics and non-Catholics at mid-century, Murray relied upon two of the most influential theologians in western Christianity to assert that Divine Providence led the Founding Fathers to place the natural law and religious liberty at the foundation of the American republic.

According to Joel Feinberg and most modern scholars of desert, the basis of desert must be a fact about the deserving person, and not about someone else. This widely accepted notion seems self-evident. However according to some religious traditions, such as Buddhism and Roman Catholicism, merit can be transferred from one person to another. That is, someone can deserve something based on some fact about someone else, such as the fact that someone else has carried out an action. This article examines the Catholic concept of merit transfer, first distinguishing it from other contemporary qualifications to the claim that a desert basis must be something about the deserving person. Then the article draws on Thomas Aquinas's explanation of the central role of relationship and love in merit and how it justifies merit transfer to address several objections made by modern scholars to such transfers. After addressing these objections, the article argues that literal understandings of merit transfer are preferable to metaphorical ones, and lastly some implications of merit transfer for Christian theology and the theory of desert more broadly are briefly discussed.

This paper introduces Phenomenological Thomism by accomplishing the three tasks Thomas Aquinas sets for every prooemium. First, to promote goodwill (beniuolus), it shows how fruitful Phenomenological Thomism promises to be by arguing that it unites the strengths of two complementary alternatives to the modern starting point. Second, to make teachable (docilis), it delineates the principal vectors of phenomenological engagement, including philosophy of nature, philosophical anthropology, ethics, epistemology, metaphysics, philosophical theology, and revealed theology. Third, to arouse attention (attentus), it focuses on the theme of manifestation to highlight the challenge of bringing the two traditions together. In this way, the prooemium encourages the further development of Phenomenological Thomism as a research program involving countless scholars and an infinity of tasks.

The majority of studies on ‘faith’ (fides) in the thought of Thomas Aquinas consider it in a religious or theological context: fides as the theological virtue by which one assents to the truths of divine revelation. The focus on theological faith is appropriate, given its central importance as a theological virtue, but this is not the only sense of fides that Thomas identifies. The present study investigates two non-theological senses formulated in his commentary on the De Trinitate of Boethius: first, fides as the proximate cause of assenting to principles within a given science (‘epistemic faith’) and, second, fides as an indispensable element of society (‘societal faith’). These senses have been largely overlooked in secondary literature but, I argue, might help to dispel mischaracterizations of faith as fundamentally unreasonable.

The basic question of this article is whether Thomas Aquinas's doctrine of divine providence through his understanding of primary and secondary causation can be understood as a theological causal or non-causal explanation. To answer this question, I will consider some contemporary discussions about the nature of causal and non-causal explanations in philosophy of science and metaphysics, in order to integrate them into a theological discourse that appeals to the classical distinction between God as first cause and creatures as secondary causes to explain God's presence and providence in the created universe. My main argument will hold that, even if there are some philosophical models of explanation that seem to allow one to suggest that, at least partially, this doctrine could be seen as a non-causal theological explanation, there are other models that offer seemingly stronger reasons to see this doctrine in full as a causal theological explanation.

The development of Thomas’s teaching on Christ’s headship relies upon the principle of the causality of the maximum: ‘the maximum in a genus is the universal cause in that genus’. This principle appears in the fourth way to demonstrate God’s existence. Applied to the humanity of Christ, Thomas argues that Christ, on account of his perfect fullness of grace, is, according to his humanity, the universal source of grace for all the members of the Church, including the angels. How does this cohere with Thomas’s teaching elsewhere in the Summa theologiae that it is only as Word that Christ causes grace in the angels? In this paper, I explore this tension and offer a way of understanding Thomas’s broader approach to the mystery of Christ.

This paper examines, from a Thomistic perspective, the possible consequences of the twentieth-century reform of the ‘Kyrie eleison’ from ninefold set of invocations to a sixfold call-and-response structure. First, we present Aquinas’s distinctly Trinitarian exegesis of the ‘Kyrie’ in light of the history of troped liturgical texts. Next, we will account for the historical diversity of the troped ‘Kyrie’ genre while emphasizing importance of the Trinitarian elements. The third section recounts recent work on Aquinas’s theory of the passions and their effects of language formation; this leads to the fourth section, which casts a philosophical eye on the role of melisma in the liturgy. To conclude this study, we suggest the restoration of some troped ‘Kyrie’ texts in the Roman Rite.

From 1923 to the present day, various studies have increasingly analysed the beginnings of the cult of Thomas Aquinas, as well as the authenticity of his works. Over the last century, the reception of Thomas Aquinas between these two poles of sanctity and the authority accorded to his works has shown itself to be a significant pairing, of which this article unpacks some important stages.

Broadly drawing on the writings of Thomas Aquinas, this article is a systematic-theological (rather than historical-theological) engagement with the theme of providence and divine causality. It aims to dispel some modern misunderstandings of these topics by highlighting how pre-modern approaches differ from today's perspective. It does so by arguing, firstly, that Thomas, given his teleological focus, construes divine causality not so much as efficient causality but rather in terms of final causality. I will also make the point that Thomas's calling God a ‘universal cause’ should not be construed in terms of omni-causality, as if God predetermines every event (be it necessarily or contingently). In the final part of this contribution, I make some observations on the arbitrariness of afflictions and the connection with the gratuitousness of charity within the providential ordering.

Science-engaged theology has emerged as a new way of conducting research within the vast field of science and religion, with the aim of, at least in one way of understanding it today, solving theological puzzles. In this article we suggest that an analysis of the diversity of approaches in which thirteenth-century philosopher and theologian Thomas Aquinas engaged theological questions with the best knowledge of the natural world available at the time allows twenty-first century science-engaged theologians to move forward the discussion about the different ways of engaging theology with the contemporary natural sciences.

Antony Flew argued for a ‘presumption of atheism’ that intended to put the philosophical debate about God under a light which demands setting the meaningfulness and logical coherence of the theistic notion of ‘God’ before any arguments for His existence are suggested. This way of proceeding, discussing divine attributes before considering the arguments for the existence of God, became dominant in analytic philosophy of religion. Flew also stated that Aquinas presented his five ways as an attempt to defeat such a presumption of atheism. However, Aquinas proceeds in the reverse order, beginning with God's existence before discussing the divine attributes. He does so because he believes that natural knowledge of God must be drawn from creatures. Accordingly, from the Thomist perspective, natural theology is necessary not because it provides rational justification for religious belief in God's existence, but rather as a means to fix the referent for the word ‘God’ (semantic function) and provide an intelligible account of the divine nature (hermeneutic function). We should also acknowledge a correlative hermeneutic function of religious faith. Therefore, natural theology should not begin from a presumption of atheism nor proceed in the way suggested by Flew, because its main intention is not strictly apologetical.

A number of thinkers in recent decades have argued that, in light of the Trinity, we can see that God's being is communion. Particularly effective was John D. Zizioulas, whose Trinitarian ontology centered on communion. Some skeptical of this claim have invoked Aquinas as a source for countering an ontology of communion. I argue that, while Thomas never explicitly affirms that the divine being is communion, he can give us deep resources for reaching this conclusion. Indeed, he can ultimately lead us towards a divine being which is more thoroughly a matter of communion—and towards an ontology which is more radically Trinitarian—than anything we find in Zizioulas.

In a 2021 contribution to Politics and Religion, Jesse Russell wrote that St. Thomas Aquinas “had a decidedly illiberal view of a government.” He says Aquinas “advocates a government in which the people are not given public liberty” and did not “prepare the way for the mixed monarchy of the English constitution.” But Aquinas places the rule of moral law above politics, endorses participatory government, prioritizes reciprocal duties rather than coerced conformity, favors a mixed regime with democratic representation, and sanctions resistance to tyrants. Each idea is an important component of modern understandings of freedom. Liberal democracy as a constitutional arrangement, and its various philosophical defenses, postdate Aquinas by centuries. It would be anachronistic to cast him as their partisan. But neither was he a proto-reactionary: his political philosophy is congenial to free, limited government that belongs to the people.