Is the United States out of the intervention business for a while? With two difficult wars in Iraq and Afghanistan and a divided public, the conventional answer is that it will be a long time before any American president, Democrat or Republican, again dispatches troops into conflict overseas. As usual, though, the conventional wisdom is almost certainly wrong. Throughout its history, America has frequently used force on behalf of principles and tangible interests, and that is not likely to change. Despite the problems and setbacks in Iraq and Afghanistan, America remains the world's dominant military power, spends half a trillion...
