Derrick and the Domino Theory
Anytime that we have to face a new global issue, chances are that it least tangentially touches on energy.
Mr. Stupid says in Altercation
If you don't think the genocide in Sudan has anything to do with the war on terror, consider this: while the United Nations can't get more than a handful of "peacekeepers" into Darfur, China has 4,000 troops stationed in Sudan protecting its oil pipeline. Not coincidentally, China has been the biggest deterrent to the Security Council putting pressure on the Sudanese government. This is a glimpse of our future: everyone who saw Fahrenheit 9-11 and wants us to draw a line with the Saudis better be prepared when they reply "fine, we have a new client and a new protector -- don't let the door hit you on the way out."
Geopolitical thinkers used to talk about the "Domino theory" and how it applies to the spread of Communism in the world. Well, if it has not happened already, the upgraded Domino theory should include the shifting in strategic alliances centering on oil and trading off on military support.
Update: James at Alternative Energy has more thoughts in the comments section and at his blog.