The Infertile Crescent Phenomenon

The concept of the 'infertile crescent' is explored, highlighting a significant global shift where many regions, particularly across Eurasia, are experiencing below-replacement fertility rates. This trend is not limited to Europe and North America but is observable in various developing countries as well. Paul Moreland underscores that this decline in fertility rates correlates with increased urbanization, education, and economic affluence, showing a rapid demographic transition even in poorer nations like Jamaica and Thailand. The episode emphasizes the unexpected acceleration of this decline, suggesting that cultural factors are becoming more influential than the previously strong relationships between fertility rates and economic status.