Who’s afraid of population growth?

In ten years’ time, there’s a good chance that the main concern in the western world will be the threat of population collapse. Fertility rates are falling everywhere and no government has found a way of reversing the trend. Plenty have tried. South Korea has so far spent $200 billion on tax breaks and lowering childcare costs and has succeeded only in beating its own record for the world’s lowest birth rate, year after year.