Inspired by Machiavelli's classic "The Prince," Leslie H. Gelb offers illuminating guidelines on how American power actually works and should be wielded in today's tumultuous world. Writing with the perspective of four decades of extraordinary access and influence in government, think tanks, and journalism, Gelb provides an incisive look at the major U.S. foreign-policy triumphs and tragedies of the past half century, and offers practical rules on how to effectively exercise power today. "Power Rules" is an impassioned challenge to both liberals and conservatives and a plea to reclaim the true meaning of power and the essential role of common sense in solving global problems.