The secularisation thesis, the long-dominant idea in sociology that modernisation, science, and rational thinking would inevitably cause religion to decline and eventually fade away, has shaped academic understanding of modernity for decades. Yet, as Edward Dutton argues in his recent piece for The Occidental Observer, the debate around it has been largely fruitless, driven more by ideological bias than robust science.
What the Thesis ClaimedAt its core, the secularisation thesis (often associated with thinkers like Steve Bruce) predicted that as societies became more educated, urbanised, and technologically advanced, religious belief and practice would retreat to the margins. Europe was seen as the model: empty churches, declining Christian identification, and the rise of secular worldviews. Proponents viewed this as linear progress, religion as a primitive crutch replaced by reason and science.
For a time, the data from Western Europe seemed to support it. But even at its peak, the thesis struggled with anomalies: persistent religiosity in the United States, explosive growth of Pentecostalism in Latin America and Africa, Islamic revival, and the global resilience of faith.
The New Evidence of BiasA recent study published in Sociological Science delivers a powerful blow. Researchers examined scholars working on secularisation and found a clear pattern: religious scholars were significantly less likely to find evidence supporting the thesis, while non-religious (especially atheist) scholars were more likely to endorse it. This bias held even after controlling for methodology, study quality, and context.
This shouldn't surprise anyone familiar with the state of modern social science. Sociology has long been dominated by Left-leaning, environmental-determinist assumptions. The secularisation thesis fit neatly into a worldview that sees humans as blank slates shaped entirely by social forces marching toward atheist enlightenment. Personal ideological commitments masqueraded as neutral analysis.
The Genetic and Evolutionary RealityDutton's deeper critique draws on consilience, the unity of knowledge across disciplines. Twin studies show religiosity is highly heritable (up to 0.66). It behaves like a psychological adaptation: it rises under stress, correlates with better mental and physical health, promotes pro-social behaviour, and boosts fertility.
This explains why simple modernisation narratives fail. While industrialisation and reduced mortality temporarily weakened religiosity in the West (by making death less salient), deeper patterns reassert themselves. Religious people consistently outbreed non-religious people. Among high-IQ groups, religiosity remains a strong predictor of fertility. The future, demographically, belongs to those who show up, and that increasingly means the religious.
Secularisation in parts of the West may therefore represent a temporary dip rather than an inevitable endpoint. Meanwhile, in much of the Global South, religion is not fading, it is thriving.
Scope and LimitsThe secularisation thesis has some limited scope:
It correctly described institutional decline and reduced public influence of mainstream Christianity in much of Western Europe.
It captured a real shift toward individualism and pluralism in belief.
But its limits are now glaring:
It underestimated the persistence and adaptability of religion.
It ignored genetic influences on human psychology.
It failed as a universal theory of modernity, applying poorly outside Northwestern Europe.
Most fatally, it was built on shaky ideological foundations rather than rigorous, interdisciplinary science.
As Dutton concludes, the thesis deserves to "Rest in Peace" — not because religion is doomed, but because the simplistic environmentalist prophecy underlying it has been falsified by better evidence. The future of the West may well involve not continued secular drift, but a resurgence of faith among those who maintain higher birth rates and cultural confidence.
Sociology's long, ideologically charged debate over secularisation stands as a cautionary tale. When social science abandons consilience and rigorous standards in favour of comforting narratives, it produces Leftist heat but little light. The data, genetics, and demographics suggest a more complex story: religion is not dying — it is evolving, and in many places, it is winning the long game.