When I was in high school in 1967, I remember my History teacher talking about Malthus, and the Malthusian Theory.
This guy lived 200 years ago.

He said that human population would increase, and increase, until it reached the breaking point. At that time, there would be a massive kill off, due to either war, or plague, or starvation. Millions, or billions, would die.

Now my high school teacher laughed off Malthus, saying that we had modern medicine, and we had massive agriculture that this poor dumb bastard could not dream of 200 years ago.

But no, I think Malthus was right. We are going to hit the breaking point and there will be a massive die off.

That is why, I am not only opposed to illegal immigration to our country, I am opposed to ALL immigration. We have enough people right now.
Also I am in favor of abortion. If a woman does not want a baby and does not want to care for it, she should have an abortion. We have enough people right now.

It is easy to say, right now, that we have plenty of room in America and we welcome all comers. We could not get overpopulated. But we could, and if we keep up what we now are doing, we will overpopulate. And then, we will break.