I won't judge you or your comment but I have to say as a rationalist(?) and atheist, it seems very odd to suggest the natural world would be a kind place if we were less destructive to it. By kind I mean non-infectious, non-aggressive, non-carnivorous etc. (as I read you anyway)
Another way, I don't see that the lion would lie down with the lamb in any circumstances. I don't dispute that we're destroying the world, just questioning that in the absence of said destruction we would be in an eden where they, lion and lamb, would.
Curious for your response, if any.