Yep - that's a sticky subject. Anyone old enough to remember the major oil crisis in the 1970's - http://en.wikipedia.org/wiki/1973_oil_crisis
knows that we've had 40 years to develop alternatives.
And that the US should be fully energy independent by now.
And that people should be driving vehicles that don't require wars for oil by now.
We drive what the manufacturers make available (and what hasn't been suppressed).
There are hurdles to overcome, and they probably would have been, were it not for the enormous profits made in the industry.