"Suppose the countries exporting oil to the USA today decide to cut those exports (following the US example) and keep them for their own domestic consumption!"
Many countries have made the decision to control their own exports--Iran in the 50's; Saddam in the 00's are two examples that come to mind.

Protectionism spreads. It is rising in the US, as it is always seemingly a simple solution to complex problems. I suppose enough has been posted about US-China currency / trade relations. This link from Morgan Stanley may have been (I haven’t had tine to follow everything.)

View points on immigration, same story, Julian Delasantellis in the Asia Times:

Exurbia: Built on paradox and hypocrisy

Now, the slaves should go home.

on edit, addition: the article makes links between energy, exurbia, labor, sociology and politics, though it is only a newspaper article, and a short read.