Population projections are shaping conversations about having kids and climate change. But how do they really work?
This story was originally published in The Highlight, Vox’s member-exclusive magazine. To get early access to member-exclusive stories every month, join the Vox Membership program today. Humans have always tried to glimpse the future. Our methods have improved — from the stars and tarot cards to tremendously complex election forecasts. People love predictions, making them…








