Why would they give a crap about what we would do to our (right, it's not our planet; well it sure as hell isn't their planet, those idiot Gaia worshipers). What a lame excuse, there are only a few planets capable of supporting advanced life. First of all, I find that hard to believe. Maybe it evolves on few but there should be a lot in billions of planets that can support life. And this unbelievably technologically advanced group of civilizations (must not be that many since there are so few planets capable of supporting them) wouldn't be capable of terraforming (or whatever they would call it)?

Helen's constant whining, please don't kill us, "we can do better" concedes the validity of Klaatu's argument which is utterly absurd. Convince him he and his ilk are immoral bastards if they are going to kill billions of humans, not that he is right and they should please give us a chance to join the Sierra Club and kiss Al Gore's butt.

At the end, all the power going off, this is a solution? Having us lose modern power sources would condemn 90+% of us to starvation and miserable deaths. That would have us at each others' throats in a Road Warrior world (without even the benefit of some energy) within weeks. I guess that's why the movie ended there before we saw our wonderful new green world take its utopian shape.