perceived inequality
Mother Jones has a very clear visual presentation of the increase in economic inequity over the last years - 11 charts they say shows it all. I'm not sure it shows it all, but they are well worth looking at, particularly these two:
And this one, which shows the perception that Americans have - that things are much more equal than they are.
Ultimately, the same battles being fought in the Middle East are going to be fought here - because with an ever-shrinking pie in an economy that will struggle to grow because of a declining resource base, there's no other option.
Sharon