At a moment of serious challenge, battered by two wars, ballooning debt, and a faltering economy, the United States appears to have lost its capacity to think clearly. Consider what passes for national discussion on the matter of Iran. The open question is whether the United States should or will attack Iran if it continues to reject American demands to give up uranium enrichment. Ignore for the moment whether the United States has any legal or moral justification for attacking Iran. Set aside the question whether Iran, as Secretary of Defense Robert Gates recently claimed in a speech at West Point, “is hellbent on acquiring nuclear weapons.” Focus instead on purely practical questions. By any standards Iran is a tough nut to crack: it is nearly three times the size of Texas, with a population of 70 million and a big income from oil which the world cannot afford to lose. Iran is believed to have the ability to block the Straits of Hormuz in the Persian Gulf through which much of the world’s oil must pass on its way to market.