In light of the main topic having been put to bed, there's some interesting side discussions here:
Re: America being the most powerful nation in the history of mankind
A lot of you have made some interesting arguments that you can't directly compare the USA against past superpowers like the Romans. But I say you can.
Which animal is more powerful? A modern day lion, an ice age sabertooth or a T-Rex? Even though none of these creatures existed in each other's time frames, there is no question a T-Rex would swallow the other two whole and ask for seconds.
Put in proper historical contexts, each animal was a top predator with no peer. But in absolute terms, Dino rules.
Let me offer another analogy. Which supercar is the fastest? The M-B 300SL Gullwing, the Ferrari Daytona, the McLaren F1 or the Bugatti Veyron? They are each the fastest production cars of their day, but in absolute terms, there can be no question the Veyron is the fastest.
You can say, "well the Gullwing was the Veyron of the 50s". Except we're not living in the 50s. It's half a century later and there are much, much faster cars. My competely pedestrian BMW 330i would make a 300SL sweat to beat me in a top speed run. That's progress.
Re: America vs. the entire fricken world (did somebody say "la-ser"?)
Wargames are amusing. It's a ridiculous premise, but I feel compelled to put my 2 cents in
Despite my somewhat perverse pride of our military, I'd say it'd be long and bloody, with the US eventually losing over the course of 10+ years.
The problem wouldn't be America's military defending against the onslaught of the entire world. In any single engagment, the US would win. The problem would be actually taking the fight to other countries.
Let's say we all suddenly turn into the great satanic warmongers our worst enemies say we are tommarrow. It wouldn't take long to blockade Canada and Mexico, pummel both countries with air assets and occupy them.
The problem is: what do you do after that? Any additional advance would require massive, massive manpower and I simply don't think the US has it. Or ever will.
Sure, the US Navy can sink anything it wants to in the Pacific and Atlantic. But actually putting people in Europe, the Pacific Rim while holding onto Canada and Mexico at the same time? Sorry... not gonna happen. I think we have the world's finest military, but no one is going to fight and win on so many simultaneous fronts.
Add time to this equation and it wouldn't take TOO long for the world to share technology, ramp up into war production and simply out produce the US. Given the big head start, the US would probably make great strides in the early days, but it wouldn't be able to hold onto much outside North America. After a few years, the US would simply be overwhelmed.
Now, if you're talking about a totally defensive war, with the US simply holding off the entire world while it tried to invade American soil... that's another story. But it would still eventually lose.
EDIT:
Mod's note. Since this spin-off topic has it's own thread, let's all just take a minute to remember a couple of things: 1) It's just hypothetical --don't get your underoo's in a twist over it --as it's all about as likely to happen as Cate Blanchett appearing at my front door for a coca-butter rub-down and 2) It's most definately non-serious. Keep it lighthearted and it stays open. Otherwise...
click.
M