But humanity is destroying this nest.

I like making this comparison: Humanity is in its teenage years, rebelling against what nurtured us, struggling to find our identity, our role in life itself.

I doubt that mankind in it's current state will play a significant role in destroying the world, that's just our teenage brains attributing everything in the world to ourselves.

We're just creating a big old mess in our room and making life miserable for ourselves... we'll get past that... it might take another millennium or a few until we grow up, but I trust we'll get there.