If a caterpillar doesn't know its future has wings, it hardly experiences itself as land-bound.

I think most Americans believe that although it's better not to use military force if you can avoid it, that the world simply doesn't provide us the luxury of giving away military force as an important tool of foreign policy.

When it comes to setting national priorities, determining threats, defining challenges, and fashioning and implementing foreign and defense policies, the United States and Europe have parted ways.

I believe it is still true that conflicts among major powers usually stem from geopolitical rivalries but rarely from economic competition.

Americans are from Mars, Europeans are from Venus: they agree on little and understand each other less and less.

Foreign policy is like hitting a baseball: if you fail 70 percent of the time, you go to the Hall of Fame.

In my view, America has never had the opportunity to enter paradise. Europe enjoys the paradise it enjoys, in part because the United States provides the overall security that allows Europe to live in a system where military power is not a major issue.