Alex
hey, it's not extinction on the way, it's Ragnarok, 'cause only the gentle, non-greedy sociopathic folk will be left and all the corporate monsters and rabid zealots will be dead!!
GO GO THOR! ;)

on other point
what I HATE about many scifi films, especially "Avatar" is that there is one super weapon we on Earth can't do jack squat about: mass drivers.
Millions of asteroids out there to smelt metals from, and fire at ultra high speed down on our silly heads.
Any species capable of interstellar travel could be millions of years old (civilization wise that is) with compmensurate tech
chunk of steel size of a Man's head fired from orbit could vapourize a city.
Their tech would be so far ahead of ours as ot appear to be magic.

compare a World War 2 battleship to Stone Age headhunters...or rather, Word War Three warship with railguns and Phalanx Cannons and MetalStorm...

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