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Just a note: An object passing through the solar system massing enough to pull planets out of orbit makes the infintessimal chance of the earth being hit by a large object look like a sure thing. While I'm not wholey sure on it, I'd also wager being pulled out of orbit would be the least of our worries in that case.
We've screwed up big on population, but these things tend to work themselves out in one way or another.
I agree with the statements that losing natural fuels isnt' going to phase us much. I'd even argue that the depletion of these fuels is benificial to any race reaching forward, as it's sure to spur things on.
Nukes are a sad, sad, fact of life. Although it's true that there are more nukes spread across more countries/groups then ever before, as a species, this is a good thing. Five nukes would have little to no impact on the species as a whole, providing major agricultural centers weren't targeted. The real danger is nuclear war, where salvos of the things are flying back and forth. Luckily, this doesn't appear to be upon us.
We'll die out as surely as the dinosaurs did, as surely as stars have over and over again. It's a long, long way off, though.
__________________
" ' Big Mouth.
Remember it took three of you to kill me.
A god, a boy, and, last and least, a hero.' "
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