> we're not overpopulated now, but in a few generations we will be.
They said that a few generations ago, too. Hell, Thomas Malthus said that we already were, and he said that centuries ago. We always seem to be on the brink of a catastrophic population explosion that will result in mass starvation and misery. Maybe it's time we admit that Malthus was dead wrong.
You might say that we'll soon run out of room, but why is no one saying we ran out of room a long time ago? The natural human condition is to live off the land as nomadic hunters and foragers, in groups of no more than a few hundred, not live sedentarily in cities of many thousands if not millions of people. Is that way of life feasible now, with how many people there are now?
We've been adapting for about 10,000 years, or 500 generations, to live sustainably with overpopulation. We've dealt with famine and plague. We will continue to innovate and find new ways to deal with them. And, as population grows exponentially, so does human innovation, so long as we continue to provide the means for humans to innovate.