Time and again-from the collapse of the Soviet Union to the events of 9/11 to the onset of the Arab Spring-events have caught the experts, whether in government or on the outside, completely by surprise. Business owners with comparable performance records go bust. Brokers lose their clients. Physicians get sued for malpractice. Yet think-tankers and policy wonks continue to opine, never pausing to reflect on-or apologize for-their spotty records.

In present-day America, expressing reverence for those who serve in uniform is something akin to a religious obligation. Everyone professes to cherish America's "warriors." Yet such bountiful, if superficial, expressions of regard camouflage a growing gap between those who serve and those who applaud from the sidelines. Our present-day military system, based on the misnamed All-Volunteer Force, is neither democratic nor effective. Why has discussion and debate about its deficiencies not found a place among the nation's political priorities?

Why do terrorist attacks that kill a handful of Europeans command infinitely more American attention than do terrorist attacks that kill far larger numbers of Arabs? A terrorist attack that kills citizens of France or Belgium elicits from the United States heartfelt expressions of sympathy and solidarity. A terrorist attack that kills Egyptians or Iraqis elicits shrugs. Why the difference? To what extent does race provide the answer to that question?

As a kid I was enamored with fiction, most of it utterly forgettable and long forgotten.

Memorial Day orators will say that a G.I.'s life is priceless. Don't believe it. I know what value the U.S. government assigns to a soldier's life: I've been handed the check. It's roughly what the Yankees will pay Roger Clemens per inning once he starts pitching next month.

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?

Ideology makes people stupid.