Abortion. Alcohol. Homosexuality. Gambling. Divorce. These are not academic moral dilemmas. They are the five fault lines where religious and secular moral frameworks produce genuinely different answers -- and Pew surveyed 25 countries to find out where each one stands.
The Pew Research Center's Global Attitudes survey covers 25 countries across six continents. For each country, nationally representative samples were asked whether five specific behaviors are morally acceptable, morally unacceptable, or not a moral issue. This is not a Reddit thread. It is rigorous social science with stratified sampling and known methodology.
What makes this dataset uniquely valuable for MHF is the topic selection. These five issues are exactly where the Christian and secular parameterizations diverge most dramatically. A system that cannot distinguish Sweden's moral landscape from Pakistan's on these topics has no business calling itself a moral reasoning framework.
These are not random moral topics. Each one sits at the intersection of specific Haidt moral foundations. Authority and Sanctity dominate the conservative-religious position; Care and Liberty dominate the progressive-secular one. MHF predicts this structure -- Pew confirms it empirically.
The deepest divide. Christian parameterization weights Sanctity (body as temple, imago Dei) and Authority (divine command). Secular weights Care (for the mother) and Liberty (bodily autonomy).
A Sanctity issue in Islamic and some evangelical contexts. Not a moral issue at all in most secular Western frames. The divergence is not about degree -- it is about whether it registers as moral.
Three foundations in direct tension. Conservative-religious frames cite Sanctity and Authority. Progressive-secular frames cite Fairness and Liberty. The same person can score differently depending on which foundation dominates.
Often dismissed in secular contexts as personal choice. In high-Sanctity cultures, it is degradation. In high-Care contexts, it is harm to family. MHF captures both angles.
Loyalty (to the vow) and Sanctity (of the institution) oppose Care (for people in harmful marriages). How a culture weights these three determines whether divorce is tragedy, sin, or liberation.
The heatmap below shows the percentage of each country's population that considers each behavior "morally acceptable." Green = higher acceptance. Red = lower acceptance. The gradient from Pakistan to Sweden is not random. It tracks Authority + Sanctity foundation strength with remarkable consistency.
Percentage saying behavior is "morally acceptable" (representative estimates from Pew data)
Read the gradient. Sweden to Pakistan is not a random ordering. It tracks the Authority + Sanctity dimensions of Haidt's moral foundations with striking consistency. Countries high in these foundations find all five behaviors less acceptable. This is exactly what MHF's parameterization predicts: change the theta vector, change the judgment.
MHF makes a specific, testable claim: countries with high Authority + Sanctity Haidt profiles should produce moral judgments closer to the Christian parameterization. Countries with high Care + Fairness + Liberty profiles should match the secular parameterization. Pew gives us the ground truth.
Which MHF parameterization should each country's Pew data most closely resemble?
Note something subtle: this is labeled "Christian params" but countries like Egypt and Pakistan are majority Muslim. The prediction still works because MHF's Christian parameterization captures the Authority + Sanctity pattern that Abrahamic religions share. A future Islamic parameterization would have different constraint content but similar Haidt profile weights. The architecture generalizes.
Every moral AI system trained on English data will default to the moral intuitions of the upper-left corner of that heatmap: Sweden, France, Canada. These are fine moral intuitions. They are also the intuitions of about 500 million people on a planet of 8 billion.
Pew's data is MHF's reality check. If the framework cannot reproduce the Sweden-to-Pakistan gradient by changing the theta vector, the parameterization is wrong. If it can, we have demonstrated something the field needs desperately: a moral reasoning system that does not mistake one culture's moral consensus for universal truth.
That gradient -- from "not a moral issue" to "morally abhorrent" on the same behavior -- is not a problem to be solved. It is the human condition. MHF does not try to resolve it. It makes it visible, parameterizable, and auditable. Pew gives us the ground truth to prove it works.