Hold the children

Google organizes all sorts of public data in formats designed to be useful to nonprofits and others. Consider this playable time lapse of the interrelationship between fertility rate (average births per woman) and lifespan. I once worked in reproductive health, mostly in sub-Saharan Africa, and this correlation (note: not causation) was widely known among people in the field. But I never had the resources to illustrate so clearly how countries move along this continuum.