But one reasons why the projection is that way is because countries do nudge people to not having explosive growth by all kind of measures. Some as simple as r

But one reasons why the projection is that way is because countries do nudge people to not having explosive growth by all kind of measures. Some as simple as reducing poverty. Some by making it most viable to have one or two children. Some (China) by limiting the number of children to roughly two. ... Not all of this policies are good, not all are intentionally made to have that effect. Still if you want to shrink a countries populations there are much more ways then a hard limit to the number of children (Which I think will hardly ever play out well.).