"Demographic Winter" occurs when a nation's population growth is so bottlenecked that its labor is unable to sustain the economy in basics like tax revenue, health care services--and food. Much of the developed world, with laggardly birthrates, is poised to tumble off that demographic cliff.

Ken Gronbach is an internationally lauded demographer. Analyzing population macrotrends, he forecasts calamities, upswings, and political and economic changes in the near future.

He joins to discuss the "Demographic Winter" poised to afflict much of the world, plus what the United States can anticipate over the next two decades as Baby Boomers retire and a fresh generation steps up.

Other Nations Are Insufficiently Horny