God in the
Classroom

The debate about religion and education is one of the loudest and least illuminating in public life. On one side: faith is the foundation of moral development, community, and meaning, and removing it from schools produces moral vacuity. On the other: religious education impedes critical thinking, encodes prejudice, and belongs to private life, not public institutions. Both sides are extremely confident. Almost neither side cites the research.

This article does. And the findings are, as is usually the case when ideology meets data, considerably more complicated — and more interesting — than the culture war script allows.

What Religion Actually Does for Children

Let us start with what religious upbringing demonstrably provides, according to peer-reviewed research, before looking at what it costs.

Community and social capital

The single most robust finding in the research on religion and child development is not about theology. It is about networks. Children raised in religious communities have access to a dense web of social connections — not just their immediate family, but an extended community of adults who share their parents' values, who will notice when something is wrong, who will show up at 2am. Research published in PMC found that parental religiousness was associated with lower rates of internalising and externalising behavioural problems in children across multiple national contexts — and that the mechanism was primarily social: the community, not the doctrine.

This matters enormously in an era when social isolation among children has reached what some researchers describe as epidemic levels. The question it raises is not whether religion is true but whether secular communities have built adequate equivalents. In most places, the honest answer is: not yet.

Moral development — a more complicated picture

Here the research gets genuinely interesting. A 2022 systematic review in the Journal of Child and Family Studies found, across multiple studies, that religious adolescents showed higher levels of prosocial behaviour, including helpfulness, generosity, and community engagement. They were more likely to volunteer, more likely to donate, more likely to describe themselves as oriented toward others rather than themselves.

However — and this is the finding that rarely makes the headlines — a widely cited 2015 study published in Current Biology found that children raised in secular households were, in standardised altruism measures, more generous toward strangers than children raised in religious ones. The religious children were more generous within their community but less generous across group lines.

The picture this paints is not one side winning. Religious upbringing appears to produce more strongly bounded prosociality — deeper loyalty and care within defined communities. Secular upbringing appears to produce more universalist moral instincts. Whether you consider one superior depends on what you think morality is for.

The Critical Thinking Question

This is where the stakes feel highest, and where the research is most often misrepresented.

The claim made by critics of religious education is that it inherently suppresses critical thinking — that teaching children to accept authority, to value faith over evidence, and to treat certain questions as beyond scrutiny produces minds less capable of independent reasoning. The claim made by defenders is that religious education, properly conducted, teaches children to grapple with deep questions of meaning, ethics, and human experience that purely secular curricula avoid.

Both claims have evidence behind them. The resolution depends almost entirely on which kind of religious education we are discussing.

Catechesis versus religious literacy

There is a meaningful difference, which research consistently supports, between confessional religious education — instruction designed to transmit and strengthen a particular faith — and religious literacy education — instruction designed to develop understanding of religion as a human phenomenon, including its history, diversity, psychology, and cultural significance.

A 2024 paper in the British Journal of Religious Education argued that the latter, when well designed, actively promotes critical thinking — not despite dealing with religion but because religion's central questions (What is a good life? What do we owe each other? What happens when we die?) are precisely the questions that require students to reason carefully under conditions of genuine uncertainty, which is among the most demanding intellectual tasks there is.

The research on confessional education is more mixed. Studies consistently find that children in faith schools score comparably or better on standard academic measures — but that the effect largely disappears when controlling for socioeconomic selection effects. Faith schools, in many countries, attract academically engaged families with strong community investments. It is those families, not the religion, that drive the academic performance.

The Long-Term Evidence on Religious Schooling

Beyond moral development and academic performance, researchers have examined what happens over longer timescales. A 2023 analysis published in the Journal of Development Economics studied the effects of compulsory religious education in schools, tracking participants across multiple decades. The findings were nuanced: exposure to religious education in childhood was associated with higher religiosity in adulthood, unsurprisingly. But it was also associated with earlier marriage, more children, and lower rates of women's participation in the labour market — outcomes consistent with the specific social norms transmitted by conservative religious institutions.

This finding is important because it illustrates a core tension. Religious education does what it claims: it transmits values and shapes behaviour. The question societies have to answer is whether the values being transmitted align with the other goods they are trying to promote — gender equality, individual autonomy, critical engagement with authority.

The evidence suggests that when they do not, the effects persist for decades.

What the Evidence Actually Recommends

If you sit with this research honestly, the "religion has no place in schools" position and the "remove religion and you destroy morality" position are both contradicted by it. What emerges instead is a more careful prescription.

Religious community matters for child development in ways that secular institutions have not fully replaced. The network of trusted adults, the shared moral vocabulary, the rituals that mark time and loss — these are real goods, and their absence is measurable. Any honest secular account of education has to wrestle with this.

Confessional instruction in public schools has costs that the research documents clearly: it tends to reinforce in-group/out-group thinking, can suppress questions that cut against the tradition, and transmits social norms that may conflict with liberal democratic values. These are not hypothetical concerns.

Religious literacy — education about religion, not within it — has genuine cognitive and civic benefits. Understanding why human beings believe, what the world's traditions teach and why they diverge, and how faith intersects with culture and politics is not merely tolerant: it is intellectually demanding in exactly the ways good education should be.

There is, finally, a question this series has been circling since Part 1: if the brain is hardwired for transcendence (Part 1), and if that transcendence is available through secular means (Part 2), what is the right institutional response to a world in which many people, especially younger generations, are leaving organised religion at historically unprecedented rates?

The evidence suggests the answer is neither triumphalism nor panic. It is the harder work of building communities that provide what religion provided — belonging, ritual, moral formation, and access to awe — without requiring a particular cosmology as the price of entry. Some secular communities are beginning to do this. The research on how to do it well is, genuinely, still being written.

Which is, in its own way, a reason for hope.