"A story of drinkers, genocide and unborn girls"

I wanted to briefly note that, over at Quartz, David Bauer has an interactive essay taking a look at the different factors in different areas of the world which lead to widely varying sex ratios. Female-selective abortion, male-heavy migration, changing patterns of life expectancy, demographic trends in the BRICs versus ost-Communist countries versus high-income countries--it's all there.