This month, the 8 billionth child entered the world. Demographers believe that the world’s population is moving towards 10 billion. But at some point, the curve will begin to move downwards. People everywhere (except sub-Saharan Africa) will become older and older, leading to huge burdens on government social services.

The problem is that most countries have birth rates below replacement level. And no one knows how to coax women into having more children, as China has discovered, to its dismay.

What is to be done? A solution comes from an improbable source – wealthy, geeky tech and venture-capitalist pro-natalism activists.

Read more here.