In some places, "the wolf is coming back, nature is taking over, so to speak, and it's really literally only old people" left, says Harald Wilkoszewski, a political scientist with Population Europe, a collaborative network of European demographic research centers.

WSJ: Germany's Rapidly Aging Population Threatens Rural Towns

President Obama's new science adviser, John Holdren, is a fervent believer in the crank theories of Paul Ehrlich, a once popular scientist who wrote the 1968 bestseller The Population Bomb, along with treatisespredicting imminent mass global starvation and various other apocalypses.

FORBES: Humanity Deniers

President Obama's new science adviser, John Holdren, is a fervent believer in the crank theories of Paul Ehrlich, a once popular scientist who wrote the 1968 bestseller The Population Bomb, along with treatises predicting imminent mass global starvation and various other apocalypses.

FORBES: Magazine Article

Accordingly, the scientist or physician who owes duties of loyalty to either his academic peers or patient population cannot be allowed to subordinate their interests to either his financial well-being or that of the commercial enterprises with which he has some sort of business arrangement.

FORBES: Causing More Harm than Good: Conflict-of-Interest Rules Thwart Medical Progress

The figure for Basques is around a quarter, despite 30 years of nationalist self-government and control of education and the media, and despite the departure of around 10% of the population because of ETA's violence, points out Francisco Llera, a (Socialist) political scientist in Bilbao.

ECONOMIST: How much is enough?