"The overarching challenge for U.S. foreign policy today, it seems to me, is to adapt to an international landscape in which American dominance is fading. To put it bluntly, America is no longer the only big kid on the geopolitical block. That’s not meant to be a declinist argument. In fact, I’m still bullish about America’s place in the century unfolding before us. We can’t turn the clock back to the post–Cold War unipolar moment... There’s a compelling case for American diplomacy as our tool of first resort in this new and more competitive era, a case that can win more respect and support from our fellow citizens and attract a new generation of the best that our society has to offer."