This book outlines a new strategy that applies the organizing principles of progressive internationalism--national strength, free enterprise, liberal democracy, U.S. leadership for collective security--to the new challenge of defeating Islamist extremism. That plan, as set forth in detail in this book, revolves around five progressive imperatives for national security: * First, we must marshal all of America's manifold strengths, starting with our military power but going well beyond it, for the struggle ahead. * Second, we must rebuild America's alliances, because democratic solidarity is...