I don't know that human existence has to mean the planet is out of balance.
I don't think so, either, but I think that's what we face right now.

I don't know if we're doomed to continue living out of harmony with the earth and, thus, end up with something like that television show, or if we will finally come to our senses.

We, in the West, live so wastefully, and we've painted ourselves into a corner with the way we've designed our infrastructure. Plus, there's just too many of us everywhere. I think, being of the earth, that the earth will seek its own level and harmony will be achieved, but I don't know that it will be to the benefit of human beings.
Interesting. I agree, it's definitely what we face right now. Our lifestyles are ridiculously wasteful. We've definitely painted ourselves into a corner, like you said.

What really bothers me- and I don't know how much of an impact it would have at this time, but it couldn't hurt- is the lack of birth control in the 3rd world, along with the Bush administration's gag rule and the Catholic Church's stance. It's awful the forces at hand- some a result of willful action, others the result of willful inaction- that lead to overpopulation, unwanted children, and all the things that go along with that (disease, poverty, etc.) There are a lot of things our world needs to do, and tackling that problem is definitely one of them. It goes hand in hand with the "green" movement at large, I think.
Yes, the continued patriarchal, parochial, and fundamental points of view in this country, seemingly getting worse before they get better, are not helping with healthy outlooks on birth control or child rearing.

Fortunately, there are some lights in the darkness. Have you every read any Sarah Hrdy? I recently read her book, Mother Nature, A Natural History of Mothers, Infants, and Natural Selection, in which she talks about subjects like control of reproductive rights, infanticide, "mother love," and maternal ambition. If only there were more enlightened people like her.