In this talk, statistician Hans Rosling looks at whether, globally, religion impacts national fertility rates. His conclusion? Nah, not really. He also points out that while fertility rates are certainly correlated with national income levels, it’s no longer true that a nation must be wealthy before experiencing significant reductions in fertility rates. While all of the nations with fertility rates of 6 or more children per woman are, indeed, quite poor, many similarly poor countries have fertility levels similar to that in much wealthier nations — an average of about 2 children per woman.