Organized Religion and Population Growth: Mechanisms, Evidence, and Implications

Abstract This paper examines the role of organized religion in contributing to population growth (and in some cases over‑population) by reviewing key mechanisms (such as teachings on contraception, pronatalism, and political influence), summarising empirical evidence from multiple contexts, and discussing implications for policy, ethics, and sustainability. While religion is not the sole driver of fertility, it interacts with socioeconomic, cultural and institutional factors in ways that can postpone fertility decline or sustain higher fertility rates. The paper concludes that while religion can be part of the explanation for population growth, sustainable population strategies require integrated approaches that respect religious values and human rights.