Aron Strandberg has a great series of tweets on demographic trends.
Projection: #India overtaking #China as the world's most populous country. @conradhackett @MaxCRoser pic.twitter.com/epSN0pNw9k
— Aron Strandberg (@aronstrandberg) November 26, 2015
Nigeria is also expected to overtake the US population at some point after 2050.
Projection: #Nigeria closing in on the US as the world's third most populous country @conradhackett @MaxCRoser pic.twitter.com/gKQLRUX0xj
— Aron Strandberg (@aronstrandberg) November 26, 2015