What is the most important discussion you could have with your children or a young person dear to you? Don’t do drugs? No means no? Practice safe sex? Take care of your mental health? Stop using plastic? How about: should you have’ children?

It s not a question about population control. While we’re heading for 9.7 billion people (by 2050) on the planet, population experts tell us we ’ ll reach a peak of 11 billion in 2100 and then begin to decline. Left to our own devices, we will naturally start to reduce population levels...