Argument

Argument from the Proportionate-Causality Convergence

Intro

Aquinas held that an effect cannot have more reality than its cause. Descartes made the same point in Meditation 3 and built his whole proof for God around it: the cause must contain in itself, formally or eminently, at least as much reality as is found in the effect. Leibniz reframed it as the principle of sufficient reason. The principle of proportionate causality (Latin causa proportionata effectui) is not a peripheral medieval-scholastic technicality. It is the working framework of metaphysics: if you see an effect, there has to be a cause adequate to produce it.

Now look at first-century-to-fourth-century Christianity. A crucified itinerant rabbi from an occupied province at the eastern edge of the Roman Empire is executed on Friday. By the year 30, a handful of his followers are claiming he is alive. By the year 60, the message has reached Rome, Antioch, Corinth, Ephesus, Alexandria. By 100, there are Christian communities across the empire from Spain to Persia. By 300, despite three centuries of intermittent persecution that included execution of bishops, burning of scriptures, confiscation of property, and public torture, roughly ten percent of the empire is Christian. By 313, Constantine signs the Edict of Milan. The minority-sect from a crucified-Messiah-claimant has converted the Empire. Rodney Stark's The Rise of Christianity (1996) called it the most improbable demographic event in classical history. Larry Hurtado in Destroyer of the Gods (2016) noted that this was a religion with no temple, no animal sacrifice, no political power, no priestly-caste, no civic-festival-recognition, that nonetheless out-competed every other religious option in the empire.

The principle says the cause has to be adequate to the effect. The natural-sociological accounts of Christianity's spread (Pauline missionary network, the plague-conversion dynamics of 165 and 251, Christian charitable infrastructure, the appeal to women and slaves, urbanization) are real and they explain part of the data. They do not produce a proportionate-cause for the specific scale and specific improbability of the effect. Christianity claims the proportionate-cause: a real historical-resurrection of the crucified founder, witnessed by named individuals, embraced at the cost of life. The principle of proportionate causality applied to the historical-spread of Christianity points exactly where the Christian-historical-claim names the cause. That is the argument.

In full

Two independently-established structural features converge. First, the metaphysical principle of proportionate causality: an effect cannot have more reality, perfection, or explanatory-content than its proportionate cause. Aquinas formalizes this in Summa Theologiae Ia q.4 a.2 (causa proportionata effectui) and applies it to the existence-of-God argument. Descartes runs the same principle as the load-bearing move in Meditation 3: the cause must contain at least as much reality as the effect, "formally or eminently." Leibniz's Principle of Sufficient Reason is the modern restatement. The principle is foundational to classical metaphysics and survives in contemporary philosophical-causation literature (Mumford, Lowe, Pruss). Second, the historical-sociological data on the first-300-years of Christianity: from a crucified Galilean rabbi executed in c. AD 30, the movement spread from Jerusalem to Antioch, Damascus, Asia Minor, Greece, Rome, North Africa, Egypt, Mesopotamia, and India in 70 years; by 100 there are Christian communities across the empire; by 300 roughly 10% of the empire is Christian (Stark 1996; Hurtado 2016; Schnabel 2004; Ehrman 2018, non-Christian); by 313 the Edict of Milan ends formal persecution; by 380 Christianity is the state religion. The spread occurred under persecution, against political-military-economic incentives, from a position of social marginality. The two domains converge: the metaphysical principle demands a proportionate-cause; the historical effect requires a proportionate-cause; naturalistic-sociological accounts supply partial proximate-causes but do not produce a proportionate-cause for the specific scale-and-improbability of the effect; the Christian-historical claim of a real bodily resurrection is the proportionate-cause the historical-effect demands.

Argument structure

Form

Convergence-shaped with a historical-Christological landing. P1 establishes the metaphysical principle (independently held across Aristotle-Aquinas-Descartes-Leibniz). P2 + P3 establish the historical-sociological side: the magnitude and the adverse-conditions of the first-300-years effect. P4 applies the principle to the effect: the cause must be proportionate. P5 names the Christian-historical proportionate-cause: the resurrection-event. P6 prices the rival naturalist-proximate-cause accounts. The inference at C is abductive: among live worldview options, the principle of proportionate causality applied to the empirical historical-effect points to the resurrection-cause. The argument is historical-evidential rather than purely-philosophical; soundness is contemporary across the metaphysical-principle literature and the historical-sociological scholarship.

P1, The principle of proportionate causality

Affirmative case

1. Aristotle's Metaphysics I.3-7 introduces the four-causes framework within which proportionate-causality is articulated. The efficient-cause must be sufficient to produce the effect.
2. Aquinas formalizes the principle in ST Ia q.4 a.2. "Every effect in some way resembles its cause... a cause cannot give what it does not have." The Latin scholastic formulation: causa proportionata effectui, the cause-proportionate-to-the-effect.
3. Descartes runs the principle as the load-bearing move in Meditations III (1641). "There must be at least as much reality in the efficient and total cause as in its effect... for whence could the effect derive its reality, if not from the cause?" Descartes uses the principle to argue from the idea of God in the mind to the actual existence of God as the proportionate-cause of the idea.
4. Leibniz's Principle of Sufficient Reason (Monadology §31-32, Theodicy) is the modern restatement: nothing happens without a reason sufficient to explain why it happens and not otherwise. The PSR generalizes proportionate-causality across the metaphysical-explanatory domain.
5. Contemporary philosophical-causation literature retains the principle. Stephen Mumford's Dispositional Theories of Causation (2003-onward); E.J. Lowe's The Four-Category Ontology (2006); Alexander Pruss's The Principle of Sufficient Reason: A Reassessment (Cambridge, 2006). The PSR has critics (Hume's classic challenge, contemporary naturalist-rejections by van Inwagen and others), but the principle of proportionate-causality in the narrower-form (effect cannot exceed proportionate cause) has held the field as a working presumption in metaphysical explanation.

Anticipated objections

1. "The principle of proportionate causality is medieval-scholastic metaphysics that contemporary analytic-philosophy has moved past."
2. "Hume's analysis of causation (no necessary-connection between cause and effect) refutes the proportionate-causality principle."

Rebuttals

1. The principle survives in contemporary philosophical-causation literature (Mumford, Lowe, Pruss). It is not a medieval-scholastic relic; it is a working presumption in contemporary metaphysics-of-causation. The "analytic-philosophy moved past it" claim is overstated; the more accurate statement is that the principle has critics and defenders in active dialogue, with the principle holding the working-default in most metaphysical explanation.
2. Hume's analysis applies to the necessary-connection between cause and effect; it does not establish that any cause can produce any effect. The proportionate-causality principle is the weaker claim that the cause must be sufficient to produce the effect, which Hume's analysis does not refute. Even on a Humean-regularity account of causation, the regularity must hold between proportionate cause and effect; an effect arising from an insufficient cause is precisely what the regularity-account excludes.

Live-cite kit

• Scholarly: Thomas Aquinas, Summa Theologiae Ia q.4 a.2; René Descartes, Meditations on First Philosophy III (1641); G.W. Leibniz, Monadology (1714) §31-32; Alexander Pruss, The Principle of Sufficient Reason: A Reassessment (Cambridge, 2006); E.J. Lowe, The Four-Category Ontology (Oxford, 2006).
• Aphorism: "Descartes put it most cleanly: there must be at least as much reality in the cause as in the effect. The cause cannot give what it does not have. The principle is the spine of metaphysical explanation, from Aristotle to contemporary philosophy."

Tactical notes

• The Hume-objection is the first move; have the cause-must-be-sufficient distinction (which Hume does not refute) ready.
• Force-commit: "Is there any working metaphysical framework in which an effect can exceed its proportionate cause? The principle is the working-default across the literature."

P2 + P3, The first-300-years-Christianity historical-effect

Affirmative case

1. The magnitude is corpus-attested. From AD 30 (the crucifixion) to AD 313 (the Edict of Milan), Christianity spread from Jerusalem to every major center of the Roman Empire plus regions east (Mesopotamia, India). Rodney Stark's The Rise of Christianity (Princeton, 1996) constructs a mathematical-demographic model showing 40% growth per decade is sufficient to produce the documented numbers: from c. 7,500 Christians in AD 100 (about 0.01% of the empire) to c. 33 million in AD 350 (about 56% of the empire), passing the 10% threshold around AD 300. The numbers are debated at the margins; the order-of-magnitude and the trajectory are not.
2. The structural-adversity of the conditions is documented. The founder was crucified as a political-criminal (Roman documented in Tacitus Annals 15.44 c. 116; Pliny Letters 10.96 c. 112; Josephus Antiquities 18.3.3 c. 93). Persecution-corpus: Nero 64 (Tacitus, Suetonius); Domitian 95; Trajan 112 (Pliny correspondence); Decian 250 (universal-empire-wide sacrifice-edict); Valerian 257-260; Diocletian 303-313 (Great Persecution, the defining state-suppression of religion in classical antiquity until the 20th-century communist regimes). The Christians refused civic-cult participation, which made them socially-marginal and legally-vulnerable.
3. Hurtado's Destroyer of the Gods (Baylor, 2016) synthesizes the data on Christianity's cultural-distinctiveness: no temple, no animal sacrifice, no civic-festival-participation, no priestly-caste in the pagan sense, no ethnic-identity marker, an exclusive-monotheistic claim that prohibited religious-pluralism. Hurtado: this combination should have made Christianity less viable, not more, in the religious-marketplace of the empire.
4. The early-Christians embraced costly commitments. Refusal of pagan-civic-cult; willingness to face martyrdom (documented martyr-corpus from Stephen in Acts 7 c. AD 35 through Polycarp c. 155 through Perpetua and Felicitas 203 through the Great Persecution); rejection of pagan-Roman-social-norms (sexual-ethics, infanticide-and-exposure, gladiatorial-spectacle, slavery as social-foundation). Stark documents that Christianity's distinctiveness was attractive in specific demographic-niches (women, slaves, urban-poor) but was costly in all niches.
5. No comparable historical-effect. The mystery-religions (Mithraism, Isis-cult, Eleusinian-cult), the philosophical-schools (Stoicism, Epicureanism, Neoplatonism), and the other competing religious movements of the first-300-years Roman Empire did not produce comparable trans-imperial spread under adverse-conditions. Christianity is the unique case-study of the magnitude.

Anticipated objections

1. "Stark's mathematical-demographic model has been criticized; the specific numbers are contested."
2. "The first-300-years spread was not as improbable as it looks; the empire had other minority-religions that grew (Mithraism, Manichaeism)."

Rebuttals

1. The Stark mathematical-model is contested at the margins (some scholars argue for slower-growth then steeper-acceleration; some argue for higher initial-base; the specific numbers are debated). The order-of-magnitude and the trajectory are not contested. Ehrman's The Triumph of Christianity (2018), written from a non-Christian-secular perspective, accepts the general magnitude and improbability of the spread even while contesting some of Stark's specific demographic-mechanisms. The argument runs on the order-of-magnitude conclusion, not on the specific demographic numbers.
2. Mithraism peaked at roughly 1-5% of the empire and was extinct by AD 400. Manichaeism spread substantially eastward but never converted the empire. Neither produced the trans-imperial conversion under adverse-conditions that Christianity did. The "other minority-religions grew" rebuttal is true at the lower-magnitude level and does not match the order-of-magnitude that Christianity reached. The historical-effect is uniquely of the magnitude the argument requires.

Live-cite kit

• Scholarly: Rodney Stark, The Rise of Christianity: A Sociologist Reconsiders History (Princeton, 1996) + The Triumph of Christianity (HarperOne, 2011); Larry W. Hurtado, Destroyer of the Gods: Early Christian Distinctiveness in the Roman World (Baylor, 2016) + Why on Earth Did Anyone Become a Christian in the First Three Centuries? (Marquette, 2016); Eckhard J. Schnabel, Early Christian Mission 2 vols (IVP Academic, 2004); Bart D. Ehrman, The Triumph of Christianity: How a Forbidden Religion Swept the World (Simon and Schuster, 2018, non-Christian-secular); Robert Louis Wilken, The First Thousand Years: A Global History of Christianity (Yale, 2012); W.H.C. Frend, Martyrdom and Persecution in the Early Church (Anchor, 1965).
• Aphorism: "A crucified Galilean rabbi from an occupied province at the eastern edge of the empire. Three centuries later, the empire is converting. Stark called it the most improbable demographic event in classical history. The principle of proportionate causality demands an explanation."

Tactical notes

• The Stark-numbers objection is the first move; have the order-of-magnitude-not-specific-numbers response ready.
• Force-commit: "Name the comparable case in classical-imperial history: a religion that originated from an executed founder, spread without political-military-economic power, faced documented imperial-persecution, and converted the empire in 300 years. The case is unique."

P4, The principle applied to the effect demands a proportionate-cause

Affirmative case

1. The proximate naturalistic causes are real and partially-effective. Stark's sociology of conversion (open-network dynamics, social-attachment-driven conversion, intermarriage); Hurtado's mission-and-network analysis; the plague-conversion dynamics of the Antonine (165-180) and Cyprianic (249-262) plagues (Stark argues Christian charitable-response during the plagues drove conversion); Christian charitable infrastructure (orphan-care, widow-care, sick-care, funeral-care); the Empire's road-and-postal infrastructure (enabling Pauline-missionary travel); Hellenistic-Jewish diaspora networks (the synagogue as initial-pathway for Gentile God-fearers); urbanization (Christianity was disproportionately urban and the Roman world was urbanizing).
2. The proximate-causes explain part of the data and underdetermine the full effect. The proximate-causes work as amplifiers once the movement is in motion. They do not explain the origin (why the movement originated from a crucified-rabbi's-followers in the first place). They do not explain the persistence-under-martyrdom (why followers were willing to die for the claim). They do not explain the specific Christological theology that emerges from the earliest tradition (a high-Christology of Jesus-as-the-Lord, attested in pre-Pauline confessional formulae such as Phil 2:6-11 and the 1 Cor 15:3-8 resurrection-creed).
3. The structural-feature the principle of proportionate causality targets is the origin-event and the persistence-under-martyrdom. Once we have a movement with the origin-claim of a real resurrection and followers willing to die for the claim, the proximate-causes can amplify the spread. But the origin and the willingness-to-die need a proportionate-cause that the proximate-naturalistic accounts do not produce.
4. The Roman and Jewish authorities had every incentive to produce a counter-cause. A body, a tomb, a recanted-witness, a documented-hallucination-pattern. None of these are documented in the surviving corpus, including the corpus written by opponents of Christianity (Celsus, Porphyry, Julian, the Talmudic-tradition). The absence of an alternative-cause from those most-motivated-to-produce-one is empirical-evidence-against the naturalistic-proximate-cause sufficiency.

Anticipated objections

1. "Other religions also have founders willing to die for their claims; this does not establish the cause."
2. "The Christian sources are the Christian sources; you cannot use them as evidence for the resurrection-cause."

Rebuttals

1. The argument's structural-claim is that the original eyewitnesses of the alleged event were willing to die for the claim that they had seen the risen Christ. This is structurally different from later-religious-believers willing to die for traditions they inherited. The 9/11 hijackers died for what their tradition told them about events fourteen centuries prior; they did not die for what they personally claimed to have witnessed. The earliest Christians died for what they personally claimed to have witnessed (the resurrection-appearances of 1 Cor 15:3-8; the empty-tomb tradition in all four Gospels; the documented early-martyrdom corpus). The structural-feature is eyewitness-martyrdom, not follower-martyrdom.
2. The argument does not depend on treating Christian-sources as automatically-authoritative. It depends on three structurally-different sources of evidence: (a) the non-Christian historical sources documenting Christianity's existence-and-spread (Tacitus, Suetonius, Pliny, Josephus, Lucian, Celsus); (b) the internal Christian sources with multiple-attestation criteria applied historically (Bauckham's Jesus and the Eyewitnesses 2006/2017); (c) the negative evidence of no alternative cause produced by Christianity's opponents in the surviving corpus. The argument uses standard-historical-method, not Christian-authority.

Live-cite kit

• Scholarly: Stark 1996; Hurtado 2016; Ehrman 2018 (non-Christian-secular treatment); Bauckham 2006/2017 on eyewitness-Gospel-sources; N.T. Wright The Resurrection of the Son of God (Fortress, 2003) on the historical-resurrection case; Gary Habermas and Michael Licona, The Case for the Resurrection of Jesus (Kregel, 2004) on the minimal-facts approach.
• Aphorism: "The proximate causes are real and partial. They explain the amplification. They do not explain the origin or the willingness-to-die. The principle of proportionate causality forces the question: what is the cause adequate to those parts of the effect?"

P5, The Christian-historical proportionate-cause

Affirmative case

1. The earliest Christian sources name the resurrection as the originating-event. 1 Cor 15:3-8 is dated by virtually-all-scholarship to within 3-7 years of the crucifixion (Pauline-creedal-formula language; pre-Pauline tradition Paul received; multiple-eyewitness-list with named-individuals including Peter, the Twelve, more than 500 brethren most still alive at the time of writing, James, all the apostles, and Paul). Acts 2:32: "this Jesus God raised up, and of that we all are witnesses." The resurrection-claim is at the origin of the movement, not a later-developed legend.
2. The eyewitnesses paid with their lives. James son of Zebedee martyred c. AD 44 (Acts 12:1-2); James the brother of Jesus martyred c. AD 62 (Josephus Antiquities 20.9.1); Peter and Paul martyred under Nero c. AD 64-67 (1 Clement 5; Tacitus Annals 15.44; Eusebius Ecclesiastical History 2.25). The early-martyrdom corpus is not legendary-late-Christian-hagiography; it is documented in non-Christian sources (Josephus on James, Tacitus on Nero's persecution) and in early-Christian sources outside the New Testament (1 Clement c. AD 96).
3. The structural-feature is eyewitness-martyrdom for a publicly-falsifiable claim. Hallucinations do not survive multiple-witness cross-checking; group-hallucinations of consistent-content do not occur on the documented pattern (Pam Reynolds NDE and other neurological-corpus); the empty-tomb claim was publicly-falsifiable in first-century Jerusalem by simply-producing-the-body. The Christian-historical claim survives all the standard naturalistic alternative-explanations (the swoon theory; the wrong-tomb theory; the hallucination theory; the legend-development theory) when each is examined against the documented corpus.
4. The Christological theology of the earliest tradition is high-Christological from the start. Phil 2:6-11 is a pre-Pauline confessional-formula naming Jesus as "in the form of God" and giving him "the name above every name" (Kyrios, the LXX divine-name); the formula dates to within 5-15 years of the crucifixion. Larry Hurtado's Lord Jesus Christ (Eerdmans, 2003) and How on Earth Did Jesus Become a God? (Eerdmans, 2005) document that high-Christology is the earliest Christology, not a later development. The high-Christology requires a cause adequate to produce it.
5. N.T. Wright's The Resurrection of the Son of God (Fortress, 2003) is the standard contemporary-historical case for the resurrection as the proportionate-historical-cause. Wright's historical-method: the historian must produce an event-cause adequate to (a) the empty-tomb tradition; (b) the appearance-tradition; (c) the rise of early-Christology; (d) the transformation of the disciples from despair to mission; (e) the rapid trans-imperial spread. Wright's conclusion: the resurrection-as-historical-event is the cause that historically-explains the full effect.

Anticipated objections

1. "Even granting the proportionate-causality principle and the historical-effect, claiming the resurrection as the cause is a leap from historical-evidence to supernatural-explanation."
2. "Standard naturalistic-alternative-explanations (hallucination, legend-development, deliberate-fraud) account for the effect without requiring the supernatural-cause."

Rebuttals

1. The argument does not leap from historical-evidence to supernatural-explanation; it follows the principle of proportionate causality to the cause adequate to the effect, and identifies the resurrection-event as the cause Christian-historical sources name. The "leap" is the application of the principle, which is uncontroversial in metaphysical-method. Whether the cause is supernatural is a separate question; the proportionate-cause is what the principle demands, and the historical-sources identify that cause.
2. The naturalistic alternative-explanations have been engaged in the historical-Jesus literature for two centuries and have not produced a proportionate alternative-cause for the full effect. Hallucination theory fails on the multiple-witness, multiple-occasion, multiple-modality (sight, touch, eating) pattern documented in 1 Cor 15:3-8 and the Gospel resurrection-narratives. Legend-development theory fails on the early-creedal-formula dating (1 Cor 15 within 3-7 years; Phil 2 within 5-15 years). Deliberate-fraud theory fails on the willingness-to-die feature. The minimal-facts approach (Habermas and Licona 2004) shows that 5 facts are conceded by the majority of critical-historical scholarship (Jesus died by crucifixion; the disciples had experiences they believed were the risen Jesus; Paul was converted by such an experience; James the brother of Jesus was converted by such an experience; the tomb was found empty by the majority view), and the minimum-cause adequate to those 5 facts is the resurrection-event.

Live-cite kit

• Scriptural: 1 Cor 15:3-8 (the resurrection-creed); Phil 2:6-11 (the high-Christology hymn); Acts 2:32; Acts 4:20; Acts 17:6 ("these men who have turned the world upside down").
• Scholarly: N.T. Wright, The Resurrection of the Son of God (Fortress, 2003); Gary Habermas and Michael Licona, The Case for the Resurrection of Jesus (Kregel, 2004); Larry Hurtado, Lord Jesus Christ: Devotion to Jesus in Earliest Christianity (Eerdmans, 2003); Richard Bauckham, Jesus and the Eyewitnesses (Eerdmans, 2006 / 2nd ed. 2017); Michael Licona, The Resurrection of Jesus: A New Historiographical Approach (IVP Academic, 2010); Craig Keener, Christobiography (Eerdmans, 2019).
• Aphorism: "The earliest Christian sources name the cause within 3-7 years of the event. The eyewitnesses died for the claim. The Christology is high from the start. The trans-imperial spread followed. The proportionate cause the principle demands is exactly the cause the historical-sources identify."

P6, Naturalism cannot supply a proportionate-cause; classical Christianity uniquely can

Affirmative case

1. On naturalism, the proximate-causes (Pauline mission, plague-conversion, charity, infrastructure, urbanization, Jewish diaspora) are partially-effective and insufficiently-proportionate. They explain the amplification once the movement is in motion. They do not explain the origin-event or the willingness-to-die. The principle of proportionate causality, applied honestly, leaves a causal-gap between the proximate-naturalistic-causes and the full historical-effect.
2. On generic theism, the convergence is mildly predicted. A theistic creator who values truth might allow events that produce religious-movements; generic theism does not specifically predict a crucified-Messiah-with-bodily-resurrection-followed-by-empire-conversion historical-event.
3. On classical Christian theism, the historical-event is the proportionate-cause. The bodily resurrection of Jesus is the causally-adequate event that produces (a) the originating-eyewitness-claim; (b) the willingness-to-die; (c) the high-Christology from the start; (d) the trans-imperial spread under adverse-conditions; (e) the Christological-theology that emerged from the earliest tradition. The principle of proportionate causality applied to the historical data points exactly where the Christian-historical claim names the cause.
4. The argument is not a "God-of-the-gaps" argument. It is a proportionate-causality argument applied to empirical historical-data. The "gap" the argument identifies is not a temporary-scientific-ignorance gap (that future-research will fill); it is a structural-causal-inadequacy gap (that naturalist-proximate-causes do not produce a proportionate cause for the origin-event and the willingness-to-die). The structural-gap is the empirical-feature the principle of proportionate causality targets.

Anticipated objections

1. "This is a god-of-the-gaps argument: 'we cannot fully explain Christianity's spread, therefore God did it.'"
2. "The naturalistic-proximate-causes will eventually produce a fully-proportionate explanation; the gap is temporary-scientific-ignorance."

Rebuttals

1. The argument is not a god-of-the-gaps argument; it is a proportionate-causality argument. The distinction: god-of-the-gaps invokes God where natural-mechanism-not-yet-discovered is the better explanation; proportionate-causality invokes a cause-adequate-to-the-effect where the natural-proximate-causes are partial and insufficient. The argument runs on the structural-feature of the principle (cause-must-be-proportionate-to-effect), not on the inability-to-explain-mechanism. A proportionate-cause is required; the resurrection-event is the historical-sources' identified cause; the principle and the sources align.
2. The two-century-history of historical-Jesus scholarship has not produced a fully-proportionate naturalistic-explanation; the gap has persisted under two centuries of scholarly engagement. The "future-research-will-fill-it" deflection is empirically-thin given the duration of the engagement and the consistency of the structural-features that resist naturalist-proximate-account.

Live-cite kit

• Scholarly: N.T. Wright 2003; Habermas and Licona 2004; Hurtado 2003 and 2016; Bauckham 2006/2017.
• Aphorism: "This is not god-of-the-gaps. This is cause-of-the-effect. The principle of proportionate causality demands a cause adequate to the historical-effect, and the resurrection-event is the cause the historical-sources identify."

Tactical notes

• The god-of-the-gaps charge is the most common move; have the structural-causal-inadequacy vs temporary-scientific-ignorance distinction ready.
• Force-commit: "On naturalism, name the proportionate cause of the origin-event and the willingness-to-die. The proximate causes amplify; what causes the origin?"

Tactical opening and closing

Opening (debate floor)

"Aquinas held that an effect cannot have more reality than its cause. Descartes ran the same principle as the load-bearing move in Meditation 3: the cause must contain in itself at least as much reality as the effect. Leibniz reframed it as the Principle of Sufficient Reason. The principle of proportionate causality, causa proportionata effectui, is the working framework of metaphysical explanation across two thousand years of philosophy. Apply it to the first-300-years of Christianity. A crucified Galilean rabbi from an occupied province at the eastern edge of the Roman Empire is executed on Friday. Three centuries later, the empire is converting. Rodney Stark called it the most improbable demographic event in classical history. The principle demands a proportionate cause. The natural-sociological accounts of the spread explain part of the data and underdetermine the rest. The Christian-historical claim names the proportionate cause: the bodily resurrection of Jesus, witnessed by named individuals, embraced at the cost of life. The convergence between the metaphysical principle and the historical-effect is the argument."

Closing (live cite)

"Naturalism owes a proportionate-cause for the origin-event and the willingness-to-die that two centuries of historical-Jesus scholarship has not produced. The proximate causes (Pauline mission, plague-conversion, charity, infrastructure, urbanization, Jewish diaspora) are real and partial; they explain the amplification once the movement is in motion. They do not explain the origin of the movement from a crucified-rabbi's-followers, the high-Christology from the start, or the willingness-to-die for a publicly-falsifiable claim. The principle of proportionate causality applied to the historical-effect points to a cause adequate to those structural-features. The Christian-historical sources name the cause within 3-7 years of the event: the bodily resurrection of Jesus. That is the proportionate cause. The convergence is the argument."

See also

• Ris3n Arguments, the master index of convergence-shaped arguments
• Argument from the Resurrection, the standalone resurrection-argument
• Resurrection of Jesus, the historical-event concept hub
• Minimal Facts Argument, the related-but-distinct minimal-facts approach
• Argument from the Costly-Signal Convergence, sister-argument on cost-bearing-pattern
• Argument from Twin Asymmetries, sister-argument on the Cross-and-Resurrection breaking time-and-forgiveness asymmetries
• Argument from the Sacrifice-Universality Convergence, sister-argument on the Christ-as-once-for-all-sacrifice
• Cumulative Case for Christian Theism, the meta-argument these feed into

Common questions this page answers

Q: What is the Argument from the Proportionate-Causality Convergence?

It is a convergence-shaped argument for classical Christian theism that takes two independently-established structural features and shows their integration. The first is the metaphysical principle of proportionate causality (causa proportionata effectui): an effect cannot have more reality, perfection, or explanatory-content than its proportionate cause. Aquinas formalizes this in ST Ia q.4 a.2; Descartes runs it as the load-bearing move in Meditations III (1641); Leibniz reframes it as the Principle of Sufficient Reason. The principle survives in contemporary philosophical-causation literature. The second is the historical-sociological data on the first-300-years of Christianity, documented by Rodney Stark's The Rise of Christianity (1996), Larry Hurtado's Destroyer of the Gods (2016), Eckhard Schnabel's Early Christian Mission (2004), Bart Ehrman's The Triumph of Christianity (2018, non-Christian secular), and N.T. Wright's The Resurrection of the Son of God (2003). The argument: the principle demands a proportionate-cause; the historical-effect is corpus-attested and structurally-improbable; the proximate naturalist-causes are real and partial but insufficient for the origin-event and the willingness-to-die; the Christian-historical claim of a bodily resurrection of Jesus is the proportionate-cause the principle demands.

Q: Isn't this just a god-of-the-gaps argument?

No. The distinction: god-of-the-gaps invokes God where natural-mechanism-not-yet-discovered is the better explanation; proportionate-causality invokes a cause-adequate-to-the-effect where the natural-proximate-causes are partial and insufficient. The argument runs on the structural-feature of the principle (cause-must-be-proportionate-to-effect), not on the inability-to-explain-mechanism. The two-century-history of historical-Jesus scholarship has not produced a fully-proportionate naturalistic-explanation of the origin-event and the willingness-to-die; the "gap" the argument identifies is structural-causal-inadequacy, not temporary-scientific-ignorance. The principle of proportionate causality demands a cause adequate to the effect; the historical-sources name the cause; the principle and the sources align.

Q: What does Rodney Stark say about the rise of Christianity?

Rodney Stark's The Rise of Christianity (Princeton, 1996) constructs a mathematical-demographic model showing that 40% growth per decade from a base of about 1,000 Christians in AD 40 produces the documented numbers: c. 7,500 in AD 100 (0.01% of empire); c. 217,000 in AD 200; c. 6.3 million in AD 300 (10% of empire); c. 33 million in AD 350 (56% of empire). Stark argues the spread was driven by sociology-of-conversion mechanisms (open-network dynamics, intermarriage), the plague-conversion dynamics of the Antonine and Cyprianic plagues (Christian charitable response during the plagues drove conversion), and Christianity's distinctive treatment of women, slaves, the urban poor, and the sick. Stark, a sociologist not a theologian, called it "the most improbable demographic event in classical history." His mathematical-model has been engaged across two decades of subsequent scholarship; the specific numbers are debated, but the order-of-magnitude and the trajectory are not.

Q: What is the difference between proximate-causes and proportionate-cause?

Proximate-causes are the immediate-mechanism by which the effect occurs (Pauline missionary network; plague-conversion dynamics; charitable infrastructure; road-and-postal infrastructure; urbanization). These are real and they explain part of the spread of Christianity. The proportionate-cause is the cause-adequate-to-the-full-effect, including the origin-event (why the movement originated from a crucified-rabbi's-followers in the first place) and the willingness-to-die-for-the-claim (why the original eyewitnesses paid with their lives). The proximate-causes amplify the spread once the movement is in motion; they do not produce the origin or the willingness-to-die. The principle of proportionate causality demands a cause adequate to those structural-features, which the Christian-historical sources identify as the bodily-resurrection-of-Jesus, witnessed by named individuals and proclaimed at the cost of life.

Q: Is this argument original to this codex?

The Causal Adequacy Argument has been deployed in classical-and-contemporary apologetics. Aquinas's proportionate-causality principle and N.T. Wright's historical-resurrection case are canonical. What is novel to this codex (2026-06-15) is the formalization as a debate-prep convergence argument, with the metaphysical principle and the historical-sociological-effect treated as two-independent domains arriving at the same structural-claim, and the structural-causal-inadequacy vs temporary-scientific-ignorance distinction developed as the response to the god-of-the-gaps charge. The Stark + Hurtado + Schnabel + Ehrman + Wright historical-sociological corpus is integrated with the Aquinas + Descartes + Leibniz metaphysical-principle corpus into a single convergence-argument with the resurrection-event as the named proportionate-cause. The argument as a stand-alone named theistic argument in this convergence-shape has, to the maintainer's knowledge, not been published in this form.