Are there any military actions that the president of the United States may not order on his own authority? If so, what are they? Bit by bit, decade by decade, Congress has abdicated its assigned role in authorizing war. Today, it merely rubberstamps what presidents decide to do (or simply stays mum). Who does this deference to an imperial presidency benefit? Have U.S. policies thereby become more prudent, enlightened, and successful?

The U.S. military today garrisons the planet in a fashion without historical precedent. Successive administrations, regardless of party, justify and perpetuate this policy by insisting that positioning U.S. forces in distant lands fosters peace, stability, and security. In the present century, however, perpetuating this practice has visibly had the opposite effect. In the eyes of many of those called upon to "host" American bases, the permanent presence of such forces smacks of occupation. They resist. Why should U.S. policymakers expect otherwise?

You know, we live in a country where if you want to go bomb somebody, there's remarkably little discussion about how much it might cost, even though the costs almost inevitably end up being orders of magnitude larger than anybody projected at the outcome.

To divine the course of world events, you'd do as well to probe the entrails of dead animals. Better still, ask your hairstylist. She will be at least as insightful and probably more entertaining a prophet than anyone you can read in Foreign Affairs or the op-ed page of the Washington Post.

Americans once believed that their prosperity and way of life depended on having assured access to Persian Gulf oil. Today, that is no longer the case. The United States is once more an oil exporter. Available and accessible reserves of oil and natural gas in North America are far greater than was once believed. Yet the assumption that the Persian Gulf still qualifies as crucial to American national security persists in Washington. Why?

The United States military is undoubtedly the world's finest. It's also far and away the most generously funded, with policymakers offering U.S. troops no shortage of opportunities to practice their craft. So why doesn't this great military ever win anything? Or put another way, why in recent decades have those forces been unable to accomplish Washington's stated wartime objectives? Why has the now 15-year-old war on terror failed to result in even a single real success anywhere in the Greater Middle East?

Ideology makes people stupid.