All true - it's almost funny how life / art mimic and predict one another, I'll reference this game "Front Lines: Fuel of War"
www.frontlines.com that basically is the sobering and depressing vision of a probable future, maybe or maybe not, I don't think a single talking head on TV or in government get it just yet but perhaps, I have to have some hope... but in the mean time, I see several possibilities:
Our addiction to oil and reluctance to use it responsibly will force us to figure something out, not supporting the bloated suburban experiment we call America now but something like Europe in different areas capable of long term large scale population support, i.e. we abandon to a large degree the Southwest, Southern Cali, Great Plains and the Rockies...
or behind door number two
A future where we initially fight each other (U.S.-F.S.U-P.R.C) for the last hydrocarbons until our war machines and the huge logistical support networks they require make even that last super valuable hydrocarbon resources not worth it and a peace only by a lack of go-juice comes into effect...
or behind door number three
The least likely, we share what we have left, use it extremely wisely and attack this problem from all sides with everything and either get it together and change into something responsible but pretty much for our entire run as a civilization, we really only band together for making war or protecting ourselves from others planning on war on us, i give this a snowball's chance...
No future but what we make.