How a Vast Demographic Shift Will Reshape the World

The world’s demographics have already been transformed. Europe is shrinking. China is shrinking, with India, a much younger country, overtaking it this year as the world’s most populous nation.

But what we’ve seen so far is just the beginning.

The projections are reliable, and stark: By 2050, people age 65 and older will make up nearly 40 percent of the population in some parts of East Asia and Europe. That’s almost twice the share of older adults in Florida, America’s retirement capital. Extraordinary numbers of retirees will be dependent on a shrinking number of working-age people to support them.

In all of recorded history, no country has ever been as old as these nations are expected to get.