Understanding the Relationship between Science and Religion Using Bayes' Theorem.

This article explores the potential benefits of integrating religious reflection with the psychology of religion through the application of Bayes' theorem, which provides a framework for updating beliefs based on new evidence without requiring shared prior assumptions. Using a longitudinal study of religious affiliation following the 2011 Christchurch earthquake in New Zealand, the article illustrates how psychological data can inform theological understanding of religion as a virtue and human flourishing. The findings challenge the crisis-consolation theory of religion while supporting moral-functional theories that emphasize religion’s role in social cohesion during adversity. The article argues that collaboration between theologians and scientists can enrich both fields by expanding the scope of inquiry and refining theories, with Bayes' theorem highlighting that belief updates depend on prior convictions and evidence, allowing for diverse perspectives without necessitating consensus.