How does Edward Feser utilize Aristotelian-Thomistic metaphysics to establish cosmological arguments, and does this philosophical approach transcend the prevailing analytical method?

This question addresses one of the most important contemporary developments in natural philosophy and philosophical cosmology. Edward Feser represents a rising current that attempts to revive Aristotelian-Thomistic metaphysics and employ it in contemporary philosophical discussions about God's existence.

Inadequate Responses to Avoid

From some defenders of Feser:

"Feser has definitively proven God's existence through Aristotelian metaphysics." An exaggerated claim. Feser himself is more precise than this—he presents arguments he considers strong but does not claim they silence every possible objection. Claiming definitive proof weakens his position more than it strengthens it.

"Analytic philosophy has completely failed, and returning to Thomism is the only solution." Excessive simplification. Feser himself is trained in analytic philosophy and uses its tools. His project is not a complete rejection of analytic philosophy but an attempt to enrich it with Aristotelian-Thomistic insights.

"Aristotelian metaphysics is correct because it leads to God's existence." Clear circularity. A metaphysical system cannot be justified by its theological results. Metaphysics needs independent justification.

From some critics:

"Aristotelian metaphysics is ancient and has been surpassed by modern science." A superficial claim. Feser and others (David Oderberg, Stephen Boulter) present sophisticated readings of Aristotelianism that engage with contemporary physics. The question is not about "antiquity" but about philosophical validity.

"Feser is merely a biased Catholic apologist." Personal fallacy. Feser's arguments need philosophical evaluation regardless of his personal motivations. Many non-Catholic philosophers (such as David Conway) have found value in his arguments.

"The analytic method is the only standard for contemporary philosophy." An exclusionary claim. Contemporary philosophy includes multiple currents, and dialogue between different philosophical traditions is legitimate and fruitful.

Why These Responses Are Inadequate

They share in avoiding serious engagement with the technical details of Feser's project: How exactly does he utilize Aristotelian metaphysics? What are the strengths and weaknesses of his approach? Does he provide a genuine addition to contemporary discussion?

Feser's Project: Broad Outlines

Feser works on three levels:

First Level: Critique of Modern Metaphysical Assumptions

Feser sees modern philosophy (from Descartes and Hume to today) as based on rejecting fundamental Aristotelian concepts:
- Rejection of substantial forms
- Rejection of teleology in nature
- Reduction of causation to temporal succession (Humean causation)
- Pure mechanism in understanding nature

This rejection, according to Feser, led to intractable philosophical problems: the mind-body problem, the problem of induction, the problem of natural laws, etc.

Second Level: Reconstructing Aristotelian-Thomistic Metaphysics

Feser proposes returning to fundamental Aristotelian concepts:

- Hylomorphism: Every material substance is composed of matter (potentiality) and form (actuality).
- Act/Potency: The fundamental distinction between what is actual and what is potential.
- Four Causes: Material, formal, efficient, and final.
- Substances and Accidents: The distinction between independent existence and dependent existence.

But Feser does not merely repeat—he develops these concepts to engage with contemporary science. For example, he reads quantum mechanics from the perspective of act and potency, and interprets natural laws as expressions of substantial forms.

Third Level: Constructing Cosmological Arguments

On the basis of this metaphysics, Feser builds several arguments for God's existence:

1. The First Mover Argument (Aristotelian Version)

- Every change is a transition from potency to act
- What is in potency cannot actualize itself
- Therefore every change needs a mover in act
- The essential (per se) series of movers cannot be infinite
- Therefore there exists a first unmoved mover, which is pure act

2. The Argument from Existence and Essence (Thomistic Version)

- In every contingent being, existence is distinct from essence
- What has existence distinct from essence needs a cause for its existence
- The essential series of existential causes cannot be infinite
- Therefore there exists a being whose existence is identical to its essence (ipsum esse subsistens)

3. The Argument from Composition to Simplicity

- Every composite needs a cause for its composition
- The entire material world is composite (matter/form, substance/accident, existence/essence)
- Therefore it needs a completely simple cause

Strengths of Feser's Approach

1. Internal Coherence: Aristotelian-Thomistic metaphysics is an internally coherent system, providing a unified framework for understanding reality.

2. Explanatory Power: It explains phenomena that standard analytic philosophy finds difficult to explain (teleology in biology, consciousness, objective moral standards).

3. Engagement with Science: Feser does not ignore contemporary science but attempts to provide a metaphysical interpretation of it. He distinguishes between the scientific method (which he accepts) and philosophical naturalism (which he rejects).

4. Avoiding Kalām Problems: His arguments do not depend on a temporal beginning of the universe (like the Kalām argument) or fine-tuning (like contemporary design arguments), but on metaphysical analysis of present reality.

Challenges and Criticisms

1. The Problem of Prior Acceptance of the Aristotelian Framework

The basic criticism: Feser's arguments work only if we accept Aristotelian metaphysics. But why should we accept it?

Feser's response: Aristotelian metaphysics is not an arbitrary assumption but the result of phenomenological analysis of reality. Rejecting it leads to intractable philosophical problems.

Counter-criticism: But other philosophers (Ladyman, Ross) offer alternative metaphysics (ontic structural realism) that handle the same problems without returning to Aristotelianism.

2. Tension with Contemporary Physics

Concepts like "substance" and "substantial form" seem at odds with contemporary physics, which views particles as excitations in quantum fields.

Feser's response: Physics describes the mathematical structure of reality, not its metaphysical nature. Aristotelian interpretation is compatible with physical equations.

But: This raises the question of the relationship between metaphysics and physics. Is metaphysics completely independent of physics?

3. The Problem of Transitioning from First Mover to the God of Religions

Even if the arguments succeed in proving a first mover or pure act, how do we transition to a personal God who cares about humans?

Feser devotes long chapters to this transition, using Thomistic analysis of the attributes of pure act. But many see a gap remaining.

4. The Challenge from Methodological Naturalism

Philosophers like Quine reject the idea of "first philosophy" independent of science. From this perspective, Feser's entire project is based on methodological error.

Feser's response: Methodological naturalism undermines itself. Science itself assumes principles (causation, unity of nature) that cannot be scientifically justified.

Does Feser Transcend the Prevailing Analytical Method?

The answer is complex:

On one hand, yes: Feser challenges basic assumptions in prevailing analytic philosophy:
- He rejects methodological naturalism
- He rehabilitates substance metaphysics
- He defends teleology in nature
- He sees philosophy as having epistemic priority over science in some matters

On the other hand, no: Feser uses the tools of analytic philosophy:
- Conceptual precision
- Logical analysis
- Engagement with contemporary literature
- Clarity in presentation

One could say that Feser represents an "expansion" of analytic philosophy rather than a "transcendence" of it. He attempts to introduce insights from the Aristotelian-Thomistic tradition into contemporary analytic discussion.

Influence and Reception

Feser's project has generated interest and debate within academic analytic circles. However, it also faces systematic criticism from naturalist philosophers like Graham Oppy and defenders of alternative metaphysics.

Where We Stand in This Discussion Today

The period 2020-2026 witnessed a notable rise in interest in the Aristotelian-Thomistic approach within analytic academic circles. Feser's recent works, particularly his written debates with naturalist philosophers like Graham Oppy, have pushed the discussion toward greater technical precision. New names have also emerged (Gaven Kerr, Daniel De Haan) working to develop Thomistic arguments with contemporary analytic tools. Conversely, critical responses have deepened: Oppy in his recent works has provided systematic criticism of the concept of essential causal series (per se), and philosophers of ontic structural realism (Ladyman, French) have continued to offer metaphysical alternatives that do not require Aristotelian substances. The debate has not been settled, but the philosophical landscape has changed: it is no longer possible to ignore the Aristotelian-Thomistic approach as merely a historical artifact, nor is it possible to claim it has settled the discussion. The most prominent challenge today lies in the question of the relationship between metaphysics and theoretical physics—a question that remains open in both directions.

From the Perspective of Rational Probability

Feser's project is read within the framework of cumulative rational probability (rajḥān ʿaqlī) as follows:

─ His arguments are not presented as isolated certain proofs, but as elements in a broader cumulative case: Aristotelian metaphysics is first made probable by its independent explanatory power (consciousness, teleology, natural laws), then used as a basis for cosmological arguments.

─ The probabilistic force varies by level: Feser's critique of philosophical naturalism is more strongly probable than the details of hylomorphic application to quantum physics, and the basic cosmological arguments are stronger than the transition to detailed divine attributes.

─ Feser reveals that rejecting Aristotelian metaphysics is not a "neutral" position but assumes an alternative metaphysics (mechanistic or structural) that also needs justification. This revelation itself makes rational the metaphysical investigation of divine existence, even for those who do not accept the final conclusions.

─ Methodological honesty requires acknowledging that the probability here is conditioned on accepting metaphysical premises that are not self-evident to everyone, making the probabilistic weight of Feser's project real but not decisive by itself.