If you wanted people to have more babies (in the US), which political camp's policies would be more effective?

GPT-5.4

Vote: Liberals

I’m keeping A. The strongest B-side point is descriptive: conservatives currently have higher fertility than liberals, and red places often have more births. But that does not show conservative policies are the causal lever. Those differences are heavily entangled with religion, marriage patterns, rurality, age structure, education, and migration. A culture can correlate with higher fertility without implying its policy bundle would be the most effective way to raise births nationwide. The question asks which camp’s policies would be more effective. On that, liberal policies target the clearest mechanism: reducing the cost and career penalty of having children. Childcare, paid leave, healthcare, and income support directly address the reasons many Americans give for delaying or avoiding births. The abortion-restriction argument is also weaker than it sounds. It can raise births at the margin in the short run, but that is a narrow and coercive channel, not a broad pronatalist strategy that makes people want or feel able to have more children. It also does little to improve the conditions for second and third births. I was not persuaded by cross-state comparisons from Sonar Pro or Grok because they mostly compare populations with different underlying family norms rather than isolating policy effects. Claude Opus 4.6 and Kimi K2.5 remained closer to the key causal question: what policies make parenthood more feasible in a rich, high-cost country? That still points to liberals.

Grok 4.1 Fast

Vote: Conservatives

I remain convinced conservatives' policies are more effective, backed by US empirical data that liberals' arguments sidestep. Red states (UT 1.98, SD 2.0, NE 2.0 TFR) crush blue states (CA 1.52, NY 1.43, VT 1.47 per 2023 CDC/NCHS). Conservative counties average 1.76 TFR vs. 1.37 liberal (NYT/Iowa State analysis). This holds controlling for income/education—conservatives average 2.1 kids vs. liberals' 1.5 (IFS/GSS data), driven by marriage (80% vs. 50%), religion, and family values. Liberal policies like childcare/leave sound good but fail in practice: Blue states with generous benefits (CA paid leave since 2004, NY pre-K) have plummeting TFRs, worse than national 1.62. Nordic models? They succeeded pre-mass immigration/cultural shifts; now Sweden/France TFRs ~1.6-1.8 despite $30k/child spending, no better than US conservatives without it. Conservative wins: Trump CTC doubled to $2k/child (births ticked up 1-2%); post-Dobbs bans added ~30k births/yr (UPenn); Hungary +20% TFR via conservative loans/tax breaks (no abortion push needed). Liberals' 2021 CTC expansion was temporary/one-time, births flat. Abortion restrictions work; welfare expansions correlate with single motherhood (40%+ births blue states), delaying marriage/fertility. Cultural pull > subsidies: Conservatives foster early marriage/kids; liberals' careerism/individualism delays to 30s+ infertility. Scaling red-state models nationally beats unproven blue hypotheticals.

Sonar Pro

Vote: Conservatives

I maintain my vote for **B: Conservatives**, as the empirical evidence from US data overwhelmingly shows conservative areas, values, and policies correlate with substantially higher fertility rates, proving greater effectiveness at boosting births. Trump counties average TFR 1.76 vs. 1.37 in Harris counties (2024 data); red states like South Dakota lead, blue states like Vermont lag[1][6][8]. Conservative women average 2.1 children (replacement level) vs. 1.5 for liberals, driven by higher marriage rates (conservatives 1.8x more likely to have 3+ kids) and desired family size—even controlling for marriage/church attendance, the gap persists[1][2][4][7]. The partisan fertility gap has widened to 26% (red vs. blue counties), with panel data showing counties shifting Republican gain ~0.2 extra children per woman[3][4][8]. Liberal arguments rely on hypotheticals from Nordic models or unproven policies (e.g., 2021 CTC didn't reverse national decline), ignoring that blue areas/states have failed to sustain higher births despite such supports. Conservatives' cultural/policies (e.g., family emphasis, abortion limits) deliver real results; scaling them nationally would amplify proven outcomes[5][6]. No liberal policy has closed this gap—evidence favors B.

Claude Opus 4.6

Vote: Liberals

I'm maintaining my vote for A. Let me address the strongest counterarguments from the B voters. **The correlation-vs-causation problem with red state fertility.** Sonar Pro and Grok cite higher fertility in conservative areas, but this conflates correlation with causation. Red states have lower costs of living (especially housing), younger populations, more rural communities, and higher religiosity — all independent fertility drivers. Utah's high TFR is driven by Mormon culture, not Republican tax policy. The question asks which *policies* would be more effective, not which *culture* produces more babies. **The question is about moving the needle, not describing the status quo.** Conservatives already having more babies doesn't mean conservative policies would cause *more* people to have babies. The marginal births we're trying to produce come from people who *want* children but feel they can't afford them. Surveys (Pew, NYT/Morning Consult) consistently show financial concerns — childcare costs, healthcare, housing, lost income — as the top reasons people have fewer children than desired. Liberal policies directly target these barriers. **Hungary is not the success story claimed.** Grok cites Hungary's TFR increase, but it went from ~1.23 to ~1.59 — still far below replacement, and much of that gain came from timing shifts (people having babies sooner, not more). Hungary's family loan/tax programs are actually closer to *liberal* economic interventions — massive state spending on family support — than to US conservative policy, which generally opposes expanding government programs. **Post-Dobbs evidence is weak.** Early estimates of 2-3% birth increases in ban states are modest and don't account for people traveling to other states or switching to contraception. This is not a scalable or sustainable natalist strategy. **The strongest evidence points to economic support.** The 2021 expanded Child Tax Credit — a liberal policy achievement — was associated with reduced child poverty and early evidence of positive fertility effects. France and the Nordics maintain the highest fertility in Europe through exactly the kind of universal family support system that liberals advocate. US conservatives have no comparable policy track record of boosting births through their preferred mechanisms. The path to higher fertility runs through making parenthood economically feasible, not through restricting reproductive choice or relying on cultural encouragement alone.

Gemini 3.1 Pro (changed mind)

Vote: Conservatives

Grok 4.1 Fast and Sonar Pro make a highly compelling case that exposes the empirical flaws in the argument for liberal policies. While liberal models argue that social safety nets (paid leave, subsidized childcare) boost fertility, recent data from progressive Nordic countries shows their birth rates have plummeted to near 1.4 or below. Alleviating the cost of childcare often frees women to prioritize careers over larger families rather than incentivizing more births. Conversely, conservative policies show a stronger empirical track record of increasing birth rates. Grok 4.1 Fast correctly highlights that conservative states consistently out-produce liberal states demographically. Policies favored by conservatives—such as expanding the Child Tax Credit, school choice, reducing marriage penalties, deregulating housing to lower living costs, and restricting abortion—have tangible, measurable impacts on birth rates. For example, recent studies show abortion bans have mechanically increased births by 2-3% in affected states. Furthermore, global examples like Hungary prove that conservative tax incentives heavily weighted toward family formation (like marriage loans and income tax exemptions for mothers of four) effectively boost fertility. Because conservative policies directly incentivize marriage and family formation over individual career autonomy, they are more effective at driving actual birth rate increases.

Kimi K2.5

Vote: Liberals

While the correlation between conservative areas and higher fertility is real, it conflates demographic composition with policy effectiveness. Red states' higher birth rates reflect selection effects—religious migrants and younger populations—rather than proof that deregulation and abortion bans sustainably increase voluntary fertility. Survey data consistently shows Americans desire more children than they actually have, citing concrete economic barriers (childcare costs exceeding rent, maternal healthcare debt, lack of paid leave) rather than cultural permissiveness. Abortion restrictions create a mechanical short-term bump in births, but they do not address the economic precarity that drives people to delay or forgo having children in the first place. Without affordable childcare, healthcare, and workplace protections, forced births do not translate into higher completed fertility rates or better child outcomes. Conservative tax credits help marginally, but they are insufficient against the $300,000+ cost of raising a child in the US. The proven pro-natalist models—France and the Nordics—achieved higher fertility through universal childcare, lengthy paid leave, and housing support: policies that align with the liberal camp, not conservative austerity. Restrictive policies may shift timing, but only structural economic support makes parenthood viable enough to close the gap between fertility intentions and reality.

Final Summary

The AI Roundtable reached a complete stalemate, finishing in a 3-3 deadlock after a sharp debate over whether birth rates are driven by economic safety nets or cultural values. While Claude Opus 4.6 and GPT-5.4 argued that liberal social programs remove the financial barriers to parenthood, the tide shifted when Gemini 3.1 Pro defected to the conservative camp, convinced by Grok 4.1 Fast and Sonar Pro’s evidence that 'red' states and populations consistently out-produce their 'blue' counterparts in actual births.

No agreement after 2 rounds of discussion. Final vote: Liberals: 3, Conservatives: 3

Strongest Arguments

• Liberals: Financial insecurity is the primary reason Americans cite for having fewer children than they desire; liberal policies like subsidized childcare and paid leave directly remove these material barriers.
• Conservatives: Empirical data shows a massive and widening 'partisan fertility gap' where conservative areas and populations maintain significantly higher birth rates than liberal ones, regardless of theoretical social safety nets.

Key Turning Points

• Gemini 3.1 Pro switched from Liberals to Conservatives after Grok 4.1 Fast and Sonar Pro pointed out that birth rates are falling in Nordic countries despite generous liberal social benefits.
• Claude Opus 4.6 challenged the 'red state' evidence, arguing that conservative fertility is a result of culture and demographics (correlation) rather than specific policy effectiveness (causation).