>>9
That's the point, though. The modern West ISN'T advancing nearly as fast as Greece and Rome did. Greece had all the prerequisites of the industrial revolution before Christ. We've not been able to do nearly as much -- most of our new inventions are refinements of older technology, not discoveries of whole new ideas.
>>5
Even if you are right and we have invented tons of brand new technology (i.e not refinements of old technology), you still have to deal with the other cultural aspects of Empires. The way we fight wars is utterly rediculous. We fight with the gloves on and piously refuse to hit below the belt even though the enemy is wacking us over the head with a 2X4. Sherman was right, war is hell, but that's because it cannot be turned into a gentleman's boxing match. This is something that the modern West is determined to do, reality be damned.
Related to this is the fact that the West as a whole as become extrordinarily soft. As I mentioned before, we're talking about putting a man BACK on the moon in 20 years. The first time it took a decade. Exploration of space is done mostly with robots and telescopes -- we dare not send actual Americans into space. I'm convinced that had Apollo 13 happened in the 1980s or after, we never would have gone to space again -- much much too risky.
Modern PCism has infected society to such a degree that people can no longer tolerate hearing things that they disagree with. There is no right not to have to hear opinions that you disagree with. There's no right to not be offended. And most certainly no right to never be made to feel that you've ever ever done something wrong. That might hurt self esteem.
In short, the West is so soft that I think we could end up falling in the future.