>All you have to do is have the environment cause 2 people to only want to have 2 babies. Those 2 people will be quickly replaced by the couple that wants to h

>All you have to do is have the environment cause 2 people to only want to have 2 babies. Those 2 people will be quickly replaced by the couple that wants to have 3 babies. Unless you pass and strongly enforce laws limiting reproduction, which our culture seems unwilling to do, you will get overpopulation. Nature has a lot of population control mechanisms other than starvation. Like disease and predators. But humans have mostly eliminated those.