Head to head
Christian Soul Theory vs Russellian Monism
Christian Soul Theory and Russellian Monism, compared field by field from their entries in the Atlas.
At a glance
- Christian Soul Theory belongs to the Dualism family in Kuhn's Landscape of Consciousness, Russellian Monism to Neutral Monism.
- Both treat consciousness as fundamental.
- On AI consciousness, Christian Soul Theory says “Unlikely” and Russellian Monism says “Likely”.
- On life after death, Christian Soul Theory says “Yes” and Russellian Monism says “Conditional”.
- On mind uploading, Christian Soul Theory says “No” and Russellian Monism says “Likely”.
- On meaning and purpose, Christian Soul Theory says “Cosmic/Ultimate” and Russellian Monism says “Uncertain”.
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The claim
In brief
Christian Soul TheoryThis theory posits that the human person is composed of two fundamentally distinct substances: a wholly immaterial, substantial soul (the self) and a physical body or brain. The soul is the locus of consciousness, provides personal identity, and interacts with the body in a cause-and-effect manner.
Russellian MonismRussellian Monism posits that the physical world, described by physics only in terms of structure and relations, has an intrinsic nature (quiddities) that is phenomenal or proto-phenomenal. This approach integrates consciousness into the fundamental reality while avoiding the traditional problems of dualism and reductive materialism.
What consciousness is
Christian Soul TheoryConsciousness and the mind are grounded in the substantial, unified, wholly immaterial soul, which is the entity that has experiences and grounds personal identity.
Russellian MonismConsciousness (or proto-consciousness) is the intrinsic, categorical nature or property ('quiddities' or 'inscrutables') underlying the relational structure of physical reality described by physics.
Big questions
Can AI be conscious?Differ
Christian Soul TheoryUnlikelyIf consciousness requires a radically separate, nonphysical substance (soul) that is divinely created or allocated, non-biological intelligences could not generate this necessary component, making AI consciousness impossible.
Russellian MonismLikelyIf consciousness is intrinsic to matter/energy, and the combination problem can be technologically harnessed, then artificial systems built from physical substrates should achieve consciousness.
Christian Soul TheoryYesThe soul is the ‘real you,’ existing independently of the body and providing the clearest mechanism for the persistence of individual consciousness post-mortem, fulfilling the core tenet of Abrahamic religions.
Russellian MonismConditionalSurvival is unlikely for the individual conscious aggregate unless the combination mechanism is preserved or the theory aligns with a cosmic monist view, as individual consciousness (the macroscopic combination) would likely dissolve upon biological death.
Christian Soul TheoryNoUploading neural patterns and pathways would only duplicate the physical basis of consciousness. Since the necessary nonphysical substance (the soul) would be absent from the duplicate, first-person mental self-preservation would be impossible.
Russellian MonismLikelyA single-stuff reality should permit virtual immortality, provided advanced technology can manipulate and harness the micropsychic properties to accurately reproduce the macroscopic conscious aggregate digitally.
Christian Soul TheoryCosmic/UltimateAs a theological theory, it provides ultimate meaning, purpose, and value tied to divine creation, destiny, and the spiritual nature of human existence.
Russellian MonismUncertainMonisms generally allow for ultimate meaning/purpose/value. If RM takes a priority monist form with evolving consciousness, cosmic purpose may be implied.
Nature of mind
Ontology
Christian Soul TheorySubstance Dualism. Reality consists of at least two ontological categories: physical (brain/body) and nonphysical (soul).
Russellian MonismNeutral Monism or Physical Monism or Phenomenal Monism (variant dependent); fundamentally Monistic.
Mind and body
Christian Soul TheoryInteractionist: The immaterial soul relates to the physical body/brain in an informing and cause-effect way, meaning physical states cause phenomenal states, and phenomenal states cause physical states.
Russellian MonismMind and physical world are deeply intertwined, with mental properties constituting the intrinsic nature of fundamental physical entities (the categorical bases of physical dispositions).
Fundamental or emergent
Christian Soul TheoryPrimitive. The soul is a substantial, nonphysical substance, often held to be created and allocated by God (Creationism) rather than arising from material processes.
Russellian MonismPrimitive (at the fundamental level of reality, as phenomenal or proto-phenomenal properties of micro-entities).
Qualia
Christian Soul TheoryQualia (qualitative feel) are phenomenal properties borne by the immaterial soul, which provides the single, unitary awareness of complex experiences.
Russellian MonismQualia correspond to the phenomenal properties (or their precursors) that constitute the intrinsic nature of fundamental matter.
How it works
Mechanism
Christian Soul TheoryInteractionism, which requires that the physical world is not causally closed, allowing the nonphysical soul to exert causal power over the physical brain and vice versa.
Russellian MonismThe key principle is the existence of unobserved, intrinsic categorical properties ('quiddities') of matter that are phenomenal, thereby grounding consciousness in fundamental reality without expanding the physical ontology of relations.
Where it is
Christian Soul TheoryThe non-extended soul is associated with the body, being fully 'present' at each point within it.
Russellian MonismLocated in the intrinsic properties of fundamental micro-level physical entities or potentially instantiated by the universe as a whole (priority monism).
What it does
Christian Soul TheoryThe soul's main functional role is providing causal efficacy for mental states (especially in relation to libertarian free will) and grounding personal identity. It also gives form to and animates the body.
Russellian MonismAvoids the causal exclusion problem of dualism by embedding consciousness into the fundamental properties of the physical world, meaning consciousness underlies physical reality itself.
Evidence and criticism
Testability
Christian Soul TheorySpeculative/Philosophical. Direct empirical testing is impossible due to the soul’s nonphysical nature. It is argued that empirical evidence for survival beyond death (like NDEs/OBEs) would instantaneously falsify materialism and support dualism.
Russellian MonismSpeculative/Conceptual. Its fundamental claims regarding intrinsic properties are generally beyond empirical access or mathematical modeling.
Tests so far
Christian Soul TheoryReported observations such as near-death experiences (NDEs) and out-of-body experiences (OBEs) are cited by adherents as phenomena requiring a nonphysical explanation, which the soul provides.
Russellian MonismNot stated
Criticisms
Christian Soul TheoryThe primary tension is the problem of mental causation (how an immaterial soul can causally interact with the physical body/brain) and the conflict with the widely accepted scientific principle of the causal closure of the physical world. Critics often attribute persistence in this view to 'folk myths' or persistent traditions.
Russellian MonismThe primary challenge is the combination problem, which is critical: explaining how microphysical properties combine to form complex, integrated macro-level consciousness. If Panprotopsychism is assumed, it faces the problem of deriving consciousness (qualia) from proto-phenomenal properties.
Sources
Key sources
Christian Soul Theory
- The Substance of Consciousness: A Comprehensive Defense of Contemporary Substance Dualism (2023)
- The Soul: How We Know It’s Real and Why it Matters, J.P. Moreland (2014)
- Mind, Brain, and Free Will, Richard Swinburne (2013)
Russellian Monism
- What is Russellian Monism?, T. Alter and Y. Nagasawa (2012)
- Russellian Monism, T. Alter and D. Pereboom (2019)
- Panpsychism and Panprotopsychism, D. Chalmers (2016)