As of this month, the world’s population is now 7.2 billion.
According to U.N. data, half of the people around the globe (3.6 billion) live in just a half-dozen countries. China has the world’s largest population (1.4 billion), followed by India (1.3 billion). The next most-populous nations – the United States, Indonesia, Brazil and Pakistan – combined have less than 1 billion people.
via Pew Research.
The demographic future for the U.S. and the world looks very different than the recent past.
For example, the U.N. projects that during this century, the number of people living to at least age 100 will increase more than 100-fold, from 181,000 in the year 2000 to over 20 million in the year 2100.