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?

Each year terrorist attacks kill far fewer Americans than do auto accidents, drug overdoses, or even lightning strikes. Yet in the allocation of government resources, preventing terrorist attacks takes precedence over preventing all three of the others combined. Why is that?

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?

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.

I began to appreciate that authentic truth is never simple and that any version of truth handed down from on high - whether by presidents, prime ministers, or archbishops - is inherently suspect. The powerful, I came to see, reveal truth only to the extent that it suits them.

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.