So, are you saying that "our" (humans?) survival is more important?
Being humans ourselves, we have a noticable bias when it comes to self-preservation.
We're human; we don't want to die. You're human too; do you?
And how long have we been using anti-bacteria and pesticides for? Have we been battling other species for millions of years, and we are still here, because we have been winning?
That's a simplification, but essentially. Seeing as how they haven't exterminated us, and we haven't exterminated them, it would probably be more accurate to say, instead of "winning," that it's a draw.
A draw is good enough, however. Remember, in survival, the idea isn't so much to "win" as it is to
not "lose."
What is the ultimate goal--to preserve the earth or to preserve human life on earth...why?
I would say the latter... but of course, if anything were to happen to the Earth while we were on it, well...
*And wouldn't we be doing the human species a greater service by allowing the weak among us to be culled, instead of fighting the cullers (should be a word)?
Not really. By far the human species' greatest tool to insure its survival is its intellect. It's helped us make it this far in spite of lacking the biological advantages of other species.
You don't need fur if you know how to make fire. You don't need claws if you know how to make a spear.
Seems to me the more smart people you keep around, the better the chances of one of them figuring out how to make the next advancement.
Furthermore, one of our human advances is civilization... we, like many other social animals, figured out that we can accomplish more together than as individuals. It's worked for us so far..