BUDAPEST, Hungary -- In a place where adventure, idealism, passion and romance abound, I was not surprised to hear top officials talk ardently about the need for the United States to adopt a consistent, caring and comprehensive stance toward failing or failed nations such as Afghanistan. The Hungarians are right, of course. Only the United States has the ability to lead in assisting, working with or -- in the worst cases -- intervening in failing or failed nations. In fact, because such countries easily can fall prey to terrorists or other extremists, a strong, proactive U.S.-led campaign to help them...