In defense of humanity:
Humans find new applications and create complex systems, where they did not exist before. This is in defiance of entropy.
We also have the ability to create ideas that "live" long after the individual that gave birth to them is dust.
Ideas, in the form of memes, have some of the properties of lifeforms. They multiply, they evolve, they *can* die--although they have the potential for immortality.
Yes, humans destroy and userp, exploit and corrupt, Nature, but consider that we were created *by* Nature. We didn't create ourselves, spontaneously, or maliciously. And while we may act in malicious ways at times, we also act in noble ways, create beauty, preserve life (some of it, anyway), and are responsible for quite a lot of good.
Sure, we're not a mature species. We make mistakes and gross errors, and at times act irresponsibly, but we're learning. And we're doing it on our own, without anyone wiser than us, to show us a better way. I think that's pretty magnificent.
We have every bit the right to survive and prosper as any other species on this planet. Considering that we're the dominant life-form, and the most intelligent species that we're aware of, in the whole of the Universe, I'd say we have more right to survive than any other species.
And again-given that we have the power to exterminate every other form of life on Earth, and that we haven't done that-the fact that we have these kinds of moral dilemmas, and actually *care* about the fate of other species, and our planet as a whole, supports that we're stumbling in the best direction available to us.