Consciousness, Theism, and Naturalism: A Response to Oppy

Introduction

Graham Oppy’s critique of J.P. Moreland's argument from consciousness raises important questions about the relative merits of naturalism and theism. Oppy defends naturalism as the view that natural reality exhausts causal reality, contending that it is simpler and more theoretically virtuous than theism. However, his critique ultimately fails to explain what he sets out to prove. 

Not only does theism possess the resources to explain consciousness more comprehensively than naturalism, but it also avoids the latter’s fragmentary and seemingly ad hoc attempts to account for key features of reality, including consciousness, intentionality, and the abstract structures underpinning the physical universe.

While I do not defend Moreland’s specific formulation of naturalism, I will try to show that Oppy’s broader version of naturalism fails to account for these phenomena in a way that rivals the explanatory depth and coherence of theism.

1. Naturalism’s Explanatory Deficiencies

Oppy argues that naturalism’s simplicity, by positing only natural causes makes it preferable to theism. However, simplicity without explanatory power is not a virtue but a liability. Naturalism’s simplicity is achieved only by evading, fragmenting, or outright denying key features of reality.

The Hard Problem of Consciousness

Naturalism cannot account for the qualitative and subjective aspects of consciousness, particularly qualia. These irreducible aspects of experience, such as the "redness" of red or the taste of coffee, persistently resist reduction to physical processes. Oppy’s rejection of qualia as "sui generis" ignores the self-evident phenomenological data attested by conscious beings. Theism, by positing a fundamental mental reality "God", offers a coherent explanation for why irreducibly mental phenomena exist, they ultimately reflect the nature of a ultimate conscious being.

Intentionality and Rationality

Naturalism’s inability to ground intentionality the "aboutness" of mental states is even more damning. Mental states that refer to external objects or truths cannot plausibly arise from non-teleological physical processes. Naturalism must resort to implausible mechanisms like evolutionary byproducts or emergent properties, which at best describe how intentionality might arise but never explain why it exists at all. Theism, in contrast, grounds intentionality in the divine intellect, the ultimate rational source from which human rationality derives.

2. Theism’s Unified Explanatory Power

Theism’s explanatory scope and coherence far exceed naturalism’s disjointed attempts to address reality’s fundamental features. Unlike naturalism, which isolates phenomena like consciousness, morality, and abstract truths into distinct explanatory domains, theism provides a single, unified framework that integrates these phenomena into a coherent whole.

Consciousness in the Image of God

Under theism, consciousness is not an inexplicable anomaly but an expected outcome of being created in the image of a ultimate conscious God. Human minds reflect the divine mind, offering a straightforward and ontologically grounded account of subjective experience, intentionality, and rationality.

Abstract Entities and Laws

Naturalism is forced to treat abstract entities like mathematical truths and moral values as brute facts or emergent properties of a physical universe. This approach not only fails to ground their necessary and universal nature but also introduces an unsolvable interaction problem: how do causally inert entities govern or apply to the physical realm? Theism on the otherhand, resolves this issue by grounding these entities in God's maximal greatness (omniscience-consciousness), ensuring their coherence and applicability without positing an unbridgeable ontological gap.

Morality and Purpose

While naturalism struggles to provide an objective basis for moral truths, theism grounds them in God’s unchanging nature. This provides not only an ontological foundation for moral realism but also a teleological framework that imbues human life with inherent purpose. Oppy’s naturalism, by reducing morality to contingent social or evolutionary constructs, strips human dignity and ethical truths of their ultimate significance.

3. The Fatal Fragmentation of Naturalism

Oppy claims that naturalism’s reliance on natural causes simplifies its ontology, but this alleged simplicity comes at the cost of coherence. Naturalism fragments reality into disconnected explanatory domains:

Consciousness:

An emergent property that lacks grounding in a purely physical ontology.

Abstract Entities: 

Brute facts with no causal connection to the physical universe.

Moral Values: 

Contingent constructs with no necessary foundation.

This disjointed approach results in a patchwork worldview riddled with unexplained phenomena and ad hoc assumptions. Theism, by positing a single necessary being as the ground of all reality, unifies these domains into an integrated and elegant framework.

The Problem of Brute Facts

Naturalism relies on an (almost) infinite regress of brute facts/laws of nature, initial conditions, and abstract truths. Each brute fact is a gap in understanding that naturalism must accept. Theism eliminates this problem by grounding all contingent realities in a single necessary being. God is not an arbitrary brute fact but the self-existent foundation of all contingent existence.

4. The True Measure of Theoretical Virtue

Oppy emphasizes simplicity and fit with data as key theoretical virtues. Yet these criteria, when properly understood, favor theism over naturalism:

Explanatory Depth: 

Theism explains why consciousness, intentionality, and moral truths exist, while naturalism can only describe how they might arise without addressing their ultimate origins.

Unity of Explanation: 

Theism offers a unified account of existence, grounding diverse phenomena in a single cause. Naturalism’s piecemeal approach sacrifices coherence for the sake of simplicity.

Alignment with Intuitions: 

Theism aligns with deeply held human intuitions about purpose, value, and the unity of reality. Naturalism often dismisses these intuitions as illusory, undermining its credibility as a comprehensive worldview.

5. Overcoming Naturalism’s "Dual Natures" Problem

Oppy critiques theism for positing a dual reality (natural and supernatural), but naturalism itself is not exempt from this criticism. To account for abstract entities like mathematical truths and moral values, naturalism must invoke a dual ontology: one for physical entities and another for abstract realities. This creates significant interaction problems:

• If abstract entities are independent of the physical universe, their applicability becomes mysterious.

• If they are dependent on the physical universe, their universality and necessity are undermined.

Theism avoids these problems by grounding both physical and abstract realities in a single, unified source, "God". Abstract truths are reflections of God’s rational nature, while the physical universe exists as a contingent creation sustained by divine power.

Conclusion

Oppy’s critique of theism ultimately fails because it underestimates the explanatory deficiencies of naturalism and the unifying power of theism. Naturalism fragments reality into isolated domains, leaving fundamental phenomena like consciousness, intentionality, and moral truths unaccounted for. 

Theism, however, integrates these phenomena into a coherent whole grounded in the existence of a necessary, supremely conscious being. Far from being a liability, theism’s metaphysical framework provides unparalleled explanatory depth and scope, offering a vision of reality that is both intellectually satisfying and aligned with our deepest intuitions. For these reasons, theism emerges not only as a plausible alternative but as the most compelling explanation for the nature of reality.