How can America improve its image abroad? Answers to this question are being bandied by all of the presidential hopefuls. Hillary Clinton says she would “send a message heard across the world: The era of cowboy diplomacy is over.” John McCain promises to “immediately close Guantanamo Bay.” Ron Paul and Barack Obama both say they would withdraw American troops from Iraq.Implicit is the notion that George W Bush has tarnished America’s reputation in the world, and that reversing some of his...