OpenFaith & Religiona generation, through ~2045
40–50%
Most likely outcome
Managed Decline, Revivalist Form Survives (modal)
The First and Second Great Awakenings, and the revival form they left America
Read the full research →01The Outcomes — 4 scenarios, priced by the research
Managed Decline, Revivalist Form Survives (modal)40–50%
The consensus modal path. Aggregate Christian share drifts slowly from ~62% toward the high-to-mid 50s% by ~2045, evangelicals from ~23% toward high-teens/low-20s%; the post-2019 leveling becomes a gentle grind, not a cliff or a hard floor. Revival-as-FORM survives robustly: livestreamed outpourings (Asbury-2023 style), high-tension Pentecostal/charismatic and non-denom carriers hold best while mainline and the SBC slide (SBC stays largest). Gravity migrates to non-denom/charismatic/Global-South-tied expression. Historiographically the chastened both/and synthesis is EXTENDED and complicated (more global, Black/gender, computational scholarship) rather than overturned; the Awakenings stay canonical as the origin of a still-functioning revivalist order.
How this number was derived
Convergent across base-rate-first (45-55%) and driver-dominant (45-55%), the two derivations that best survived cross-examination. Base-rate-first: decline-not-collapse (~0.8, 6/6 peer nations declined >25yr) x form-survives (~0.95, 0/major US families vanish/gen) x paradigm-extends (~0.75) ~ 0.57. Driver-dominant: durable-drivers-persist (~0.85) x both/and-standard (~0.75) x leveling-holds (~0.8) ~ 0.51. Geom-mean-of-odds of the two midpoints ~0.50. LOWERED to 40-50% (from members' 45-55%) because the contrarian's intact-cohort-gradient derivation (45%-vs-62% young/old; change between-not-within cohorts) survived intact and transfers ~5-7pts into the steeper-slide scenario. Sanity-checked vs Manifold 27%/19%: both consistent with slow, not cliff, decline.
Drivers
- Cohort-replacement secularization (Voas-Chaves 5.14) — produces decline, but slowly
- Communications family + democratization keeping revival portable/networked (New-Birth-as-method; Asbury livestream 6.10/6.11; Hatch 3.20/6.3)
- Finke-Stark church-sect cycle: high-tension sects outlast accommodating mainline (5.12), so the surviving core is revivalist
- Institutional inertia of large traditions (SBC 12.7M despite 18yr decline, 3.4); denominational inversion without tradition-death (2.18)
- Mature-subfield consensus stability — both/and is already weight-of-evidence (4.8/4.23); syntheses rarely flip in a generation
Signals to watch
- Pew/PRRI/Gallup affiliation 2027-2035: slow drift near 55-62% confirms; a cliff or rebound breaks it
- Non-denom + Pentecostal/charismatic share rising while mainline accelerates down (form-survival via new carriers)
- Recurrence of Asbury-type livestreamed outpourings (networked mechanism)
- Citation/syllabus: continued 'connected transatlantic movement' both/and framing in teaching
- SBC slow decline but survival as largest body; SBC baptisms ticking up amid membership decline (3.4)
Horizon · Generational (~through 2045); slope and carrier-mix readable by ~2032-2035
Resumed Accelerated Slide and Synthesis Erosion25–35%
The contrarian's steelman fused with base-rate-first's Accelerated case: the post-2019 plateau proves a pause, not equilibrium. Cohort replacement runs mechanically — high-share elders die, the ~45%-Christian young replace them — and aggregate share resumes decline toward the low-to-mid 50s% and plausibly into the 40s% by ~2045, 'nones' a plurality, evangelicalism below 20% of adults. Revivalism survives as FORM but as a shrinking subculture, not the cultural center; the Religious-Right base ages out. Historiographically this carries elevated risk of synthesis EROSION: as living evangelicalism shrinks, or as computational and global/non-elite turns mature, the both/and is partially demoted — skeptical 'construction'/social-control readings (Butler/Lambert) and the comparative/global lens gain standing.
How this number was derived
Three derivations, weighted by survival. Contrarian decomposition: P(gradient intact, no within-cohort re-religionizing) ~0.80 x P(intact gradient lowers aggregate/gen) ~0.85 = 0.68, self-discounted to 40-50%. Base-rate-first held the SAME outcome at only 15-22% via P(accel decline ~0.45) x P(historiographic demotion|that ~0.4) ~0.18 — but cross-examination showed this required BOTH halves to fire; the religion-only slide is higher-prob and more decision-relevant, so I lift above 22%. Outside view: 6/6 peer nations continued declining; ~0/6 durable high plateau. CHAIR: this floor-vs-pause question is the central live disagreement and the between-cohort mechanism is the sharpest derivation; NO splitting the difference. Set 25-35% — above 22% (conjunction understated religion-only) but below the contrarian's 40-50% (real 2019-25 deceleration + uncertain overturn cap it). Geom-mean ~0.28.
Drivers
- Cohort-replacement (between-cohort, not within-cohort) secularization toward completion (Voas-Chaves 5.14); within-cohort re-religionizing is rare
- Erosion of religious socialization as each cohort raises a less-religious next
- Aging/contraction of the white-evangelical Religious-Right bloc; backlash repelling youth
- Paradigm-turnover: computational/digital re-periodization, global/non-elite decentering of the Edwards-Whitefield-Finney canon
- Closing of the 'American exception' vs the secular Anglosphere
Signals to watch
- GSS/Pew cohort tracking: youngest adult cohort entering BELOW the prior cohort's entry level (decisive confirm)
- Any within-cohort re-religionizing — a cohort more Christian at 35 than at 25 (refutes)
- Christian share sustained sub-58%, then sub-50%, before 2035; 'nones' crossing ~35-40%
- Evangelical share below 20% of adults; aging of the white-evangelical electorate
- A computational study settling 'did the Great Awakening exist as a unified event'; two textbook editions dropping the both/and; Australia 2026 census 'No Religion' result
Horizon · Generational (~through 2045); leveling-vs-floor resolves ~2028-2034
Genuine Stabilization / Religious-Economy Floor18–28%
The 'US exception persists' branch: the post-2019 leveling proves a genuine committed floor. Cohort decline stalls because the remaining religious population is a sticky, high-commitment, higher-fertility core (marginal Christians already exited), renewed by Global-South-origin immigration and convert retention, possibly with a small young-male uptick. Christian affiliation stabilizes in the high-50s/low-60s% through 2045; evangelical/Pentecostal share holds roughly flat as the mainline absorbs losses. The Finke-Stark religious-economy mechanism (pluralism, upstart sects winning) keeps the revivalist core resilient. Historiographically this revalidates the Awakenings-as-anti-secularization / supply-side reading; the field leans back to Finke-Stark framing and treats the US as the standing counter-example again.
How this number was derived
Convergent across base-rate-first (Leveling 20-28%) and contrarian (Stabilization 25-35%), bounded by markets. A plateau is a strictly WEAKER claim than Manifold 'affiliation increases' (27% YES), so durable stabilization sits somewhat above slide-implied mass; the 27% (and ~73% not-rising complement) caps it. Outside-view: ~0/6 peer nations produced a durable 25-yr high plateau, holding this below the modal. Both members landed near/just-above 27% adjusted down for the generational horizon. CHAIR: set 18-28% — marginally below the members' bands because the contrarian's OWN strongest derivation (intact between-cohort gradient) argues AGAINST a within-cohort floor, so its 25-35% is in tension with its own modal and earns lower weight. Geom-mean-of-odds (~0.24, ~0.30) ~0.27, trimmed for that tension.
Drivers
- Selection effect: marginal Christians already gone, leaving a high-commitment, self-reproducing core
- Differential fertility and stronger intergenerational retention among committed evangelicals/Pentecostals
- Religious-economy/supply-side vitality: pluralism and high-tension sects out-recruiting (Finke-Stark 5.12, 6.2)
- Global-South-origin immigration (Pentecostal/charismatic 3.9/5.11) reseeding US revivalism
- Democratization driver (Hatch 3.20/6.3) keeping the marketplace movement-generating
Signals to watch
- Two consecutive Pew/GSS readings flat-or-up among the youngest adult cohort, replicated 2028-2038 (decisive)
- Nones share staying plateaued at ~28-31% rather than resuming growth
- Retention rates of children raised evangelical/Pentecostal rising rather than slipping
- Pentecostal/immigrant-church growth offsetting mainline decline in aggregate
- Syllabus resurgence of Finke-Stark supply-side framing vs Voas-Chaves cohort framing
Horizon · Generational (~through 2045); cohort evidence decisive by ~2030-2034
Revival Surge / Discontinuity Tail (Fifth Awakening or regime change)6–12%
A residual tail combining the council's upside and structural-break cases. Primary sub-case: a genuine, demographically consequential resurgence — not an Asbury-style attention episode but a movement that measurably raises participation and halts/reverses aggregate decline by ~2045, most plausibly Spirit-driven (Pentecostal/charismatic), networked/digital, possibly immigrant-led, contemporaneously named a 'Fifth Great Awakening'. Symmetric structural sub-case: a communications/epistemic regime change (AI-mediated meaning-making, or collapse of the institutional church form) that breaks the print-and-itinerancy mechanism carrying revival since 1740 and produces a faster-than-secularization discontinuity. Either way the both/and consensus is disrupted by an event the field must scramble to interpret; a surge vindicates 'awakening-cycle' frameworks (McLoughlin/Fogel).
How this number was derived
Reference-class frequency adjusted by markets and discontinuity-discounting. Noticed revival episodes ~once/generation for ~280yr (camp meeting -> 1857-58 -> Moody -> Sunday -> Graham -> charismatic renewal -> Asbury 2023) make SOME noticed episode near-certain, but only ~2 of ~7 since 1800 measurably moved national adherence -> ~2/7 ~0.28 per opening, discounted hard for the secularizing backdrop. Driver-dominant priced the symmetric structural-break union (mass-revival ~3-5% + rupture ~3-5%) at ~5-10%. Market discipline: a curve-bending surge is a strict SUBSET of 'affiliation increases,' so below Manifold 27%; Polymarket Jesus-return novelty (~2%) bounds the supernatural extreme. Base-rate-first (6-12%) and driver-dominant (5-10%) converge; geom-mean ~0.08. Held at 6-12% per the long-peace caution against zeroing a real recurrence class. Survived cross-examination intact.
Drivers
- New-Birth-as-method + communications + democratization cluster making revival a repeatable, now-networked (potentially AI-amplified) method (6.10/6.11)
- Global Pentecostal vitality (~600-644M, 5.11) feeding back into the US via immigration and media
- Finke-Stark church-sect cycle producing an unusually large high-tension upstart at scale (5.12)
- Cultural-crisis catalysts (revival follows dislocation); a genuine medium shift in how religious meaning is transmitted
Signals to watch
- A revival followed by SUSTAINED multi-year attendance/baptism increases in national data, not a viral moment; SBC/Pentecostal baptisms rising durably (3.4)
- Real-time naming of a 'new awakening' that survives more than one news cycle
- An outpouring an order of magnitude beyond Asbury 2023 in reach/duration/spread
- AI-mediated religious practice/meaning-making reaching mass scale (a genuine medium shift)
- Youth-cohort religiosity inflecting upward; any single survey wave with a >5pt non-linear swing
Horizon · Generational (~through 2045); a true surge shows sustained data divergence within ~3-5yr of onset; a rupture is unscheduled
Probabilities are the research's own scenario bands, priced as outcomes. The full argument — history, current state, drivers, and sources — lives in the corpus: read the Future Trajectory chapter.
