And even if individuals can afford it, it's also become clear that the planet probably can't — that the world, were it composed of a billion Brady Bunches, would buckle under the environmental strain.

Half-sheepishly, the mechanic had eased round to nudge his mate to look also at the comical-looking bloke. And the bloke caught them both. They wiped the grin off their faces. Because the little bloke looked at them quite straight, so observant, and so indifferent.

Randall could only do so much. And his role as her boss—no matter how much he felt for her—only allowed him to go so far toward commiseration, without his offering bossly, fatherly, advice.

How Populations Stack Up Among Nations At War (name of the article)