David P. Goldman, aka Spengler, writes on world political and economic affairs for the Asia Times Online. The column I just read does a tour d'horizon and finds the U.S. becoming disengaged, moving in the direction of isolationism.
'Spengler' writes of Petraeus and his supposed successes, by which the author is not impressed. He describes Petraeus as a sort of illusionist who created the impression that good things were happening, when they in fact were not. Others have made this point as well.
Goldman makes several predictions of things lesser nations will do in the absence of U.S. influence. These are often things not in the best interests of the U.S.