I remember the 1980s.
I remember news reports and articles about how population growth was dooming the world, and that everyone was going to starve to death because there would be too many people.
I remember charities appealing for money to open contraception/birth control clinics in Africa so that women had the choice.
I remember debates about whether China's one child policy should be introduced in other countries as well - it was considered a really good thing.
The mood music has really changed!
I think that these policies and movements largely worked, and that people responded by having fewer children.
In addition, I remember studying something called the population transition at uni. This is basically the point at which additional children become a burden not an asset.
So in Niger, and in Britain in the past, children worked in the fields or in the family business from a young age. They were productive. They were also your old age pension in a society that had no state support. They supported you when you were old and couldn't work.
But in Britain, as children slowly were not allowed to work, and began to go to school, and first the friendly societies and then the old age pension happened, children cost more and weren't the only form of pension.
So people had fewer.
Now children are incredibly expensive, both in terms of money and in terms of time. You need a big house if you want lots of children. You need a big car. And as a parent there is absolutely zero return on that investment.
I reckon it'll polarise - if you are a sahm an extra child is not that expensive. You are already out of work and that is the main cost. So people will either have one or two kids or lots and lots.