The accelerating spread of nuclear weapons, nuclear know-how and nuclear material has brought us to a nuclear tipping point. We face a very real possibility that the deadliest weapons ever invented could fall into dangerous hands.

The steps we are taking now to address these threats are not adequate to the danger. With nuclear weapons more widely available, deterrence is decreasingly effective and increasingly hazardous.

One year ago, in an essay in this paper, we called for a global effort to reduce reliance on nuclear weapons, to prevent their spread into potentially dangerous hands, and ultimately to end them as a threat to the world. The interest, momentum and growing political space that has been created to address these issues over the past year has been extraordinary, with strong positive responses from people all over the world.

Mikhail Gorbachev wrote in January 2007 that, as someone who signed the first treaties on real reductions in nuclear weapons, he thought it his duty to support our call for urgent action: "It is becoming clearer that nuclear weapons are no longer a means of achieving security; in fact, with every passing year they make our security more precarious."

In June, the United Kingdom's foreign secretary, Margaret Beckett, signaled her government's support, stating: "What we need is both a vision -- a scenario for a world free of nuclear weapons -- and action -- progressive steps to reduce warhead numbers and to limit the role of nuclear weapons in security policy. These two strands are separate but they are mutually reinforcing. Both are necessary, but at the moment too weak."

We have also been encouraged by additional indications of general support for this project from other former U.S. officials with extensive experience as secretaries of state and defense and national security advisors. These include: Madeleine Albright, Richard V. Allen, James A. Baker III, Samuel R. Berger, Zbigniew Brzezinski, Frank Carlucci, Warren Christopher, William Cohen, Lawrence Eagleburger, Melvin Laird, Anthony Lake, Robert McFarlane, Robert McNamara and Colin Powell.

Inspired by this reaction, in October 2007, we convened veterans of the past six administrations, along with a number of other experts on nuclear issues, for a conference at Stanford University's Hoover Institution. There was general agreement about the importance of the vision of a world free of nuclear weapons as a guide to our thinking about nuclear policies, and about the importance of a series of steps that will pull us back from the nuclear precipice.

The U.S. and Russia, which possess close to 95% of the world's nuclear warheads, have a special responsibility, obligation and experience to demonstrate leadership, but other nations must join.

Some steps are already in progress, such as the ongoing reductions in the number of nuclear warheads deployed on long-range, or strategic, bombers and missiles. Other near-term steps that the U.S. and Russia could take, beginning in 2008, can in and of themselves dramatically reduce nuclear dangers. They include:

• Extend key provisions of the Strategic Arms Reduction Treaty of 1991. Much has been learned about the vital task of verification from the application of these provisions. The treaty is scheduled to expire on Dec. 5, 2009. The key provisions of this treaty, including their essential monitoring and verification requirements, should be extended, and the further reductions agreed upon in the 2002 Moscow Treaty on Strategic Offensive Reductions should be completed as soon as possible.
• Take steps to increase the warning and decision times for the launch of all nuclear-armed ballistic missiles, thereby reducing risks of accidental or unauthorized attacks. Reliance on launch procedures that deny command authorities sufficient time to make careful and prudent decisions is unnecessary and dangerous in today's environment. Furthermore, developments in cyber-warfare pose new threats that could have disastrous consequences if the command-and-control systems of any nuclear-weapons state were compromised by mischievous or hostile hackers. Further steps could be implemented in time, as trust grows in the U.S.-Russian relationship, by introducing mutually agreed and verified physical barriers in the command-and-control sequence.
• Discard any existing operational plans for massive attacks that still remain from the Cold War days. Interpreting deterrence as requiring mutual assured destruction (MAD) is an obsolete policy in today's world, with the U.S. and Russia formally having declared that they are allied against terrorism and no longer perceive each other as enemies.
• Undertake negotiations toward developing cooperative multilateral ballistic-missile defense and early warning systems, as proposed by Presidents Bush and Putin at their 2002 Moscow summit meeting. This should include agreement on plans for countering missile threats to Europe, Russia and the U.S. from the Middle East, along with completion of work to establish the Joint Data Exchange Center in Moscow. Reducing tensions over missile defense will enhance the possibility of progress on the broader range of nuclear issues so essential to our security. Failure to do so will make broader nuclear cooperation much more difficult.
• Dramatically accelerate work to provide the highest possible standards of security for nuclear weapons, as well as for nuclear materials everywhere in the world, to prevent terrorists from acquiring a nuclear bomb. There are nuclear weapons materials in more than 40 countries around the world, and there are recent reports of alleged attempts to smuggle nuclear material in Eastern Europe and the Caucasus. The U.S., Russia and other nations that have worked with the Nunn-Lugar programs, in cooperation with the International Atomic Energy Agency (IAEA), should play a key role in helping to implement United Nations Security Council Resolution 1540 relating to improving nuclear security -- by offering teams to assist jointly any nation in meeting its obligations under this resolution to provide for appropriate, effective security of these materials.

As Gov. Arnold Schwarzenegger put it in his address at our October conference, "Mistakes are made in every other human endeavor. Why should nuclear weapons be exempt?" To underline the governor's point, on Aug. 29-30, 2007, six cruise missiles armed with nuclear warheads were loaded on a U.S. Air Force plane, flown across the country and unloaded. For 36 hours, no one knew where the warheads were, or even that they were missing.

• Start a dialogue, including within NATO and with Russia, on consolidating the nuclear weapons designed for forward deployment to enhance their security, and as a first step toward careful accounting for them and their eventual elimination. These smaller and more portable nuclear weapons are, given their characteristics, inviting acquisition targets for terrorist groups.
• Strengthen the means of monitoring compliance with the nuclear Non-Proliferation Treaty (NPT) as a counter to the global spread of advanced technologies. More progress in this direction is urgent, and could be achieved through requiring the application of monitoring provisions (Additional Protocols) designed by the IAEA to all signatories of the NPT.
• Adopt a process for bringing the Comprehensive Test Ban Treaty (CTBT) into effect, which would strengthen the NPT and aid international monitoring of nuclear activities. This calls for a bipartisan review, first, to examine improvements over the past decade of the international monitoring system to identify and locate explosive underground nuclear tests in violation of the CTBT; and, second, to assess the technical progress made over the past decade in maintaining high confidence in the reliability, safety and effectiveness of the nation's nuclear arsenal under a test ban. The Comprehensive Test Ban Treaty Organization is putting in place new monitoring stations to detect nuclear tests -- an effort the U.S should urgently support even prior to ratification.

In parallel with these steps by the U.S. and Russia, the dialogue must broaden on an international scale, including non-nuclear as well as nuclear nations.

Key subjects include turning the goal of a world without nuclear weapons into a practical enterprise among nations, by applying the necessary political will to build an international consensus on priorities. The government of Norway will sponsor a conference in February that will contribute to this process.

Another subject: Developing an international system to manage the risks of the nuclear fuel cycle. With the growing global interest in developing nuclear energy and the potential proliferation of nuclear enrichment capabilities, an international program should be created by advanced nuclear countries and a strengthened IAEA. The purpose should be to provide for reliable supplies of nuclear fuel, reserves of enriched uranium, infrastructure assistance, financing, and spent fuel management -- to ensure that the means to make nuclear weapons materials isn't spread around the globe.

There should also be an agreement to undertake further substantial reductions in U.S. and Russian nuclear forces beyond those recorded in the U.S.-Russia Strategic Offensive Reductions Treaty. As the reductions proceed, other nuclear nations would become involved.

President Reagan's maxim of "trust but verify" should be reaffirmed. Completing a verifiable treaty to prevent nations from producing nuclear materials for weapons would contribute to a more rigorous system of accounting and security for nuclear materials.

We should also build an international consensus on ways to deter or, when required, to respond to, secret attempts by countries to break out of agreements.

Progress must be facilitated by a clear statement of our ultimate goal. Indeed, this is the only way to build the kind of international trust and broad cooperation that will be required to effectively address today's threats. Without the vision of moving toward zero, we will not find the essential cooperation required to stop our downward spiral.

In some respects, the goal of a world free of nuclear weapons is like the top of a very tall mountain. From the vantage point of our troubled world today, we can't even see the top of the mountain, and it is tempting and easy to say we can't get there from here. But the risks from continuing to go down the mountain or standing pat are too real to ignore. We must chart a course to higher ground where the mountaintop becomes more visible.

Mr. Shultz was secretary of state from 1982 to 1989. Mr. Perry was secretary of defense from 1994 to 1997. Mr. Kissinger was secretary of state from 1973 to 1977. Mr. Nunn is former chairman of the Senate Armed Services Committee.

The following participants in the Hoover-NTI conference also endorse the view in this statement: General John Abizaid, Graham Allison, Brooke Anderson, Martin Anderson, Steve Andreasen, Mike Armacost, Bruce Blair, Matt Bunn, Ashton Carter, Sidney Drell, General Vladimir Dvorkin, Bob Einhorn, Mark Fitzpatrick, James Goodby, Rose Gottemoeller, Tom Graham, David Hamburg, Siegfried Hecker, Tom Henriksen, David Holloway, Raymond Jeanloz, Ray Juzaitis, Max Kampelman, Jack Matlock, Michael McFaul, John McLaughlin, Don Oberdorfer, Pavel Podvig, William Potter, Richard Rhodes, Joan Rohlfing, Harry Rowen, Scott Sagan, Roald Sagdeev, Abe Sofaer, Richard Solomon, and Philip Zelikow.

Since the first Gulf War, most authoritarian régimes in the Arab world have been able to maintain the well-worn structures of governance that have persisted since the end of World War II and the process of decolonization. Hoped-for agents of change have been unable to mount effective political challenges and régimes that often seemed to be on the edge of international and domestic credibility have been able to refashion themselves in the ways necessary to maintain power and control.

New movements and agents of change have appeared, but they have not been had the transformative results hoped for, and régimes were able to accommodate any challenges they represented. The results of the last 20 years in the region and the world---in the socioeconomic, political, ideological, and international dimensions—have ended up disappointing expectations. Neo-liberal economic policies have failed to transform the economies of the region. New middle classes have not achieved the political independence necessary to overcome clientilist structures and challenge regimes. The middle class has, rather, become disengaged from local politics; many social groups see the hope for their future outside the national context. Furthermore, the divergent perspectives of different social classes, as well as secular and Islamic elements regarding democracy, makes a forceful challenge to authoritarianism more difficult.

In fact, regimes have adapted to the demands of different actors, and played off the tensions among different social actors, to reconstruct the apparatus of authoritarianism. Regimes have been able to pose as protectors of moderation against extremism and to adopt limited reforms that absorb some of the demands for democratization. In this way, regimes have been able to construct simulacra of civil society and upgrade the accoutrements of authoritarianism.

Meanwhile, behind the quasi-mythological narrative of nationalism and unity, currents of social and ideological tension persist, now embedded in an international context of fear and crisis. New challenges to the possibility of democratization arise from the international context of violence and intervention, from Iraq to Pakistan. The distortions imposed by the “war on terror,” including the internationalization of l’état sécuritaire and the parallel internationalization of jihadi militancy—end up providing another alibi for authoritarian regimes.

Finally, social and political tensions remain, and there is no perfect mechanism of accommodation or cooptation. There remains the possibility of change from lateral as opposed to frontal actions, and from surprising new actors. For any kind of democratization to occur, it is crucial that we “re-indigenize” a message of progressive change in the countries of the regions—creating a renewed sense of shared purpose that includes the nation and Islam, but is not confined by them, that speaks to people’s local concerns while it connects them to wider projects of peace and democracy in the region and the world.

Stanford, Calif. - The visit this week of South Korea's new president, Lee Myung Bak, offers a rare opportunity to put the American-Korean relationship back on a more solid footing. President Lee, who won a decisive victory in last December's election, has expressed views on the security alliance, a bilateral free trade agreement, and policy toward North Korea that are thoroughly compatible with US interests. And Mr. Lee's authority was bolstered by his party's substantial victory in legislative elections April 9.

The question is whether Washington is poised to take advantage of this convergence of views.

For the past eight years, a major perception gap between Seoul and Washington has been painfully evident. Our governments often worked at cross-purposes in the six-party talks to denuclearize North Korea. Progressive governments in South Korea encouraged peaceful coexistence with the North through a pattern of unreciprocated engagement. For much of that time, the Bush administration sought to isolate and pressure Pyongyang into relinquishing its nuclear ambitions, and it made little effort to conceal its hopes for a regime change in Pyongyang.

When Washington decided to move its military headquarters out of Seoul in 2003, many Korean officials suspected that the Americans were just eager to get troops out of North Korean artillery range. President Roh Moo Hyun at times seemed interested in carving out a role as a balance wheel between the major powers in Northeast Asia. Meanwhile, the US was preoccupied by problems in the Middle East, and some American officials wondered if the US-Republic of Korea (ROK) alliance could long survive when one party dismissed the North Korean threat while the other viewed it as increasingly menacing.

Now comes Lee, a former mayor of Seoul and Hyundai construction executive with a reputation for tough-minded, pragmatic conservatism, eager to correct what he described as the misguided priorities of past ROK administrations. In a recent meeting with New Beginnings, a group of American policy experts on Korea, Lee appeared determined to accord priority to the alliance with the United States, exact a measure of reciprocity from the North, forestall major economic concessions to the North until it abandons its nuclear activities, and design a more ambitious global role for his country.

Surely Washington welcomes Lee's priorities. The tougher question is whether it can work effectively with him to translate shared aims into concrete results. This will pose three particular challenges.

First, on the nuclear issue, undeniably, bilateral talks with Pyongyang can facilitate diplomatic progress. There are dangers as well. Disconnects with the Japanese have deepened, and their officials occasionally complain about American "betrayals" in the discussions with Pyongyang. The North has consistently sought to use the negotiations to split the US and its allies. Success in the talks requires coordinated diplomacy between the US and the North's neighbors – especially with South Korea. In the past it often appeared that South Korean presidents worried less about Pyongyang's nuclear activities than Washington's possible reactions to them.

Today, there is the danger that South Korean conservatives may fear that Washington will ultimately acquiesce in North Korea's nascent nuclear status. No attempt to contain, let alone eliminate, the North Korean nuclear program can succeed unless the US and ROK governments work closely together. This will require a higher standard of candor and mutual trust in bilateral consultations than has been typical in recent years.

Second, the ratification of the Korea-US free-trade agreement (FTA) is a vital piece of unfinished business. Lee appears prepared to resume imports of US beef (halted due to mad cow disease concerns), essential to moving the FTA forward in Congress. Unfortunately, the Democratic presidential contenders are pandering to special interests on trade issues in a way they will probably later regret. Both sides have strategic and commercial interests at stake. The US stands to gain much more in increased exports from the FTA, while the Koreans hope that liberalizing foreign access to their economy will make them more competitive. So there is much to gain by nailing down this deal. A failure to complete it would be a significant strategic setback for our partnership.

Third, there is the question as to whether our political cycles will again diverge. For the past eight years, the US has been led by one of its most conservative administrations, while South Korea was headed by its most liberal president. Missteps were, perhaps, inevitable. And they have persisted, even though some effective work was done behind the scenes to forge cooperative arrangements on trade and force-deployment issues.

Lee's election signifies a conservative swing in South Korea's politics, while polls suggest the US may be moving in the opposite direction. Thus, a felicitous convergence of US and ROK official perspectives could prove fleeting. Yet the interests we share in expanded commerce, in modernizing our alliance, and in approaching the North with a joint strategy for "denuclearization" are compelling. They transcend partisan politics. They serve our respective national interests. The time to capitalize on them is now.

After the exhausting and dispiriting testimony of General David Petraeus and Ambassador Ryan Crocker to Congress this week, it is now even more starkly apparent that we are stuck in Iraq with no exit strategy. The plan of the Bush administration, and of these military and diplomatic leaders, is still to "stay the course" and hope things will finally take hold in Iraq: hope that the competing Iraqi parties and factions will finally settle their biggest political differences; hope that the Iraqi Army will finally show the ability to face down threats to security and hold the country together; hope that "strategic patience" will eventually allow us to draw down our forces to a level that will not stretch the U.S. Army to the breaking point. But as a group of mid-level American military officers who served in Iraq observed in a devastating edited volume of this name, "Hope is Not a Plan."

To be fair, the U.S. military surge in Iraq (and its attendant shift in strategy on the ground), has achieved many positive things. Iraqi and American casualties have fallen sharply (by more than two-thirds on some measures) from their peak levels in 2006 and early 2007. The Iraqi army and police have grown by roughly 100,000, in addition to some 80,000 local community militia forces ("concerned local citizens") armed and paid by the U.S. As a result of increased force levels and a dramatic change in strategy toward engaging the Sunni Arab communities (including forces once active in the resistance), Al Qaeda has been driven out of most Sunni Arab communities, particularly in Anbar province, and its fearful grip on that section of the country has been broken. This has been the most important achievement of the surge. In many Iraqi urban neighborhoods, both in Baghdad and in other cities, particularly in the once lawless Anbar province, Iraqis have been able to return to the streets and to something approaching normal commercial and social life.

One of the biggest blunders has been the analytical failure to see that the Shiite Islamist political party's political triumph in Iraq would bring a strategic bonanza to Iran--effective control of at least the southern half of Iraq. These are not small achievements. Unfortunately, in the absence of a larger and more tough-minded strategy, they are also not sustainable ones.

John McCain may have been right for the moment when he declared to the Kansas Veterans of Foreign Wars on April 7, "We are no longer staring into the abyss of defeat." Unfortunately, in the context of continued political stalemate in Baghdad and the absence of a viable political strategy for stabilizing Iraq, the second part of his sentence simply does not follow: "... and we can now look ahead to the genuine prospect of success." Rather, as Petraeus and Crocker unwittingly made clear, what we can look forward to is the indefinite commitment of 130,000 to 140,000 American troops, holding together a country that would otherwise shatter into much wider bloodshed. Hope is not a formula for success.

The truth is, we remain trapped in an awful quagmire. No less staunch a Republican than Senator Richard Lugar observed in the Senate hearings this week, "Simply appealing for more time to make progress is insufficient." Senator McCain lacks the candor or clarity of mind to recognize that absent a new political strategy, we are stuck in a holding pattern, propping up a badly divided and corrupt political class in Baghdad. At least he has had the candor, however, to acknowledge that, under these circumstances, American troops might have to be in Iraq for another 10, 20, or 100 years.

Senators Clinton and Obama, in turn, recognize that the United States cannot maintain large numbers of American troops in Iraq for anything like that long. Not only will Iraqi resistance forces rise up against it again, but these commitments are draining our fiscal and military vitality.

Even if we were to leave Iraq tomorrow, it would take years to rebuild, re-equip, and reset the American armed forces to their pre-war levels of capacity and readiness. In a survey of American military officers by the Center for a New American Security, 88 percent thought the war had stretched the US military dangerously thin. And then there is the question of what kind of Army we will be left with as we have to lower standards further and further to find the "recruits" to sustain this military quagmire. CNN reported on April 7 that one out of every eight new recruits requires a waiver because of past criminal behavior or other prior misconduct. The percentage of high school graduates among recruits has declined to 79%. Retired General Barry McCaffrey said recently that ten percent of Army recruits "should not be in uniform." And when the Vice-Chief of Staff of the Army testifies (as General Richard Cody did last week) that repeated deployments are placing "incredible stress on our soldiers and their families" and that "our readiness is being consumed as fast as we can build it," you know we have a serious problem.

Yet Clinton and Obama don't see the other side of this awful reality: that a swift, unconditional timetable for withdrawal of the kind they propose (on the order of one to two combat brigades per month) would likely see Iraq slip back into all-out civil war -- unless something dramatic changes in the political landscape there.

We urgently need an exit strategy from Iraq, but it cannot simply be to declare we are leaving by some fixed, early date -- and goodbye and good luck. Without the prospect of a substantial American military drawdown on the near horizon, Iraq's political factions will lack the incentive to make the hard choices for a sustainable compromise that might hold the country together. But in the absence of an intense diplomatic effort to broker this compromise, the prospect of imminent American withdrawal will not induce compromise, but rather rigidity and the psychology of preparing for an imminent civil war.

So what needs to be done?

To begin with, we need a more hard-headed analysis of our real interests. For years now, the Bush administration has leaned toward the Shiite Islamist political party, ISCI (the Islamic Supreme Council of Iraq, formerly the Supreme Council for the Islamic Revolution in Iraq, or SCIRI). ISCI and its militia, the Badr Organization, which has heavily penetrated the Iraqi army and police, were formed in exile in Iran in the 1980s and grew up under the heavy influence there of the Iranian Revolutionary Guards. They subscribe to the hard-core Khomeini of system "velayat al faqih" -- rule by the Islamic jurist. And they have welcomed numerous Iranian agents into Iraq to help them establish that system.

Of the many grand blunders of the Bush administration in Iraq, one of the biggest has been the analytical failure to see that ISCI"s political triumph in Iraq would bring a strategic bonanza to Iran -- effective control of at least the southern half of Iraq. To pave the way for this, ISCI and its leader, the ailing Islamist cleric, Abdul Aziz al-Hakim, have long sought to gather all nine provinces in the Shiite southern half of the country into a single super-region, which would enable ISCI to establish political hegemony over the entire Shiite region, control most of the country's oil resources (based mainly in the Basra area of the far south), and dominate the politics of the center.

Prime Minister Nuri al-Maliki's recent ill-fated crackdown on the Mahdi Army militia of Muqtada al-Sadr was not just about establishing order in the south. A more important subterranean motive (for which the United States allowed itself to be used) was to remove the chief obstacle to ISCI's bid for hegemony in the south. Sadr and his disparate political and militia forces oppose the creation of a Shiite super-region, and constitute the most significant political rival to ISCI (and its junior partner in Shiite politics, Nuri al-Maliki's Dawa party). ISCI's calculation has been that if Sadr could be neutralized, its path to victory in the coming provincial elections in October could be cleared, and then it could press forward with its aim of gathering all nine southern provinces into one.

We should have no illusions: Sadr is a nasty, deeply illiberal character. His militia forces, or those who swagger around, draped in weapons, seizing territory and imposing Islamic order in his name, often approximate the Taliban in their level of commitment to human rights, women's rights, religious freedom, and the rule of law. But Sadr's political movement is a broad tent that also includes more nationalist Shiite elements who share with one another (and with many Sunni Arab factions with whom they have been in contact) a determined resistance to ISCI's and Iran's bid to control southern Iraq, and through that region, the country as a whole. In other words, the participation of the Sadrist movement in electoral politics at least preserves political fluidity and pluralism. Its elimination, while leaving ISCI and its tightly knit militia network in control of much of the security apparatus and of existing provincial governments in the south, paves the way for Iranian domination.

One of the greatest and most bitter ironies of the Bush administration's posture in Iraq has been its persistent failure to see how it was handing the greatest threat to security in the region -- the Islamic Republic of Iran -- a grand strategic prize. So far, the Iranian regime has largely succeeded in its goals of bogging the U.S. down in a bleeding insurgency, draining its military and its treasure and sapping its will, until the point that Iraq (so they think) will fall into their hands like a ripe apple. No wonder the Iranian ruling elite so often seems to be smiling like a mafia gang on its way to eliminating its rivals. As one Iraqi recently observed to me, "The Iranians are more intellectual, more strategic, and more patient than the U.S. The Bush administration's approach in Iraq has been purely tactical. When the U.S. spends a billion dollars in Iraq, Iran spends $50 million and gets more."

It is not clear that this strategic victory for Iran in Iraq can be prevented at this point. Certainly it will not come from the Kurds, who have long since struck a cynical bargain with ISCI: they can have their Shiite super-region, and in return the Kurds want to absorb into their Kurdistan region the city and province of Kirkuk, whose vast oil resources would make eventual Kurdish independence a much more viable proposition.

It does not take much facility in political arithmetic to figure out who are the big losers in all of this: first of all the Sunni Arabs (about twenty percent of Iraq's population), who have no major oil producing assets in the provinces where they predominate, and who believe the creation of a Shiite super-region would be a formula for their own permanent marginalization and impoverishment. The other big loser would be all those Iraqis (surprisingly, a majority) who continue to believe in the idea of a united Iraq, and who are adamantly opposed to Iranian domination.

For this reason, the bargain between ISCI and the Kurds (codified in the 2005 constitution) cannot be the basis of a stable and democratic Iraq. It leaves out two crucial sections of the population: first, the Sunni Arabs, and second, a majority of Iraq's Shia as well, who fought Iran in a bloody eight-year war in the 1980s and do not want their territory to become a satellite of Iran's Islamic Republic. If the United States were to withdraw from an Iraq configured along these lines, civil war would almost certainly follow. It would pit an ISCI-dominated government in the south and in Baghdad, backed by Iran, against a loose coalition of Sunni Arab and Shiite nationalist resistance, backed by Jordan, Saudi Arabia, and other Sunni Arab states in the region alarmed by Iran's expanding power (which also includes a determined drive to acquire a nuclear weapons capacity). And in the chaos, there would also be a welter of more local-level fights for dominance.

The only way out of this nightmare scenario is a coherent, well-prepared, vigorous effort to broker a constitutional compromise before it is too late. The parameters of the necessary bargain have been clear for many years. ISCI would need to give up its ambition of a single, nine-province super-region, but could be granted a federal system with the eventual ability to lobby for creation of smaller regions (of up to three provinces each, as the interim Iraqi constitution had allowed for). The Kurds would get to keep their own region as part of a federal system, but the development of new oil fields would remain a prerogative mainly of the central government, not, as the Kurds and ISCI wish, regional governments. The Sunnis would have to reconcile themselves to being a minority political force in Iraq, but their provinces would be assured a fair and automatic distribution of the oil revenue, more or less in proportion to each province's share of the population.

There are a number of other issues to be worked out as well (including the reintegration of former Baathists below the top level into government, and the pruning of ISCI loyalists from the commanding ranks of the security forces, especially the police). But the pivotal elements of a deal involve the structure of the federal system and the control of oil production and distribution of its revenue.

The constitutional deal that is needed cannot be brokered by the United States alone. A "diplomatic surge" is urgently needed, in which the U.S. would partner with the UN and the European Union. For an administration that has been loathe to surrender control in Iraq, this is a difficult step, but without it, there will be no political breakthrough, and thus no exit from the quagmire.

In the context of such a grand bargain, the United States could draw down somewhat more gradually than Clinton and Obama now envision, perhaps getting down over the course of about three years to a small residual security force to protect American civilian operations in Iraq. If the provincial elections scheduled for this October can come off without massive intimidation and bloodshed, that will help, as it will likely deliver setbacks tin the south to ISCI and Dawa (who have governed poorly) and generate a more pluralistic political terrain, in which power in the Shiite south is shared by a more diverse set of actors.

It is far from clear that Iran, so close to winning its prize, would not sabotage such an outcome. Direct and intensive engagement with the Iranian regime would also be needed. This could offer the Iranians other incentives as part of a larger deal that would include verifiable suspension of their nuclear program. It could also play on the prospect of what they could themselves could face in an Iraq without the United States: a divided Shiite community, part of which is rising up in resistance to their dominance, allied with a united Sunni community with the broad backing of other Arab states in the region. And all of this before they had acquired the nuclear weapon they think will give a huge boost to their regional power.

A certain amount of brinksmanship would be needed to demonstrate to Iran that the alternative to compromise in Iraq is that they could wind up trading places with us, being bled and drained in an insurgent war while their enemies score opportunistic gains. In that case, the strategic prize could become an albatross around the neck of a regime that faces huge economic and political problems within Iran itself.

The above offers no sure path out of Iraq. Should diplomacy fail, we would be left with little choice but to prepare to withdraw, perhaps rapidly and in extremis, letting the regional actors and the Iraqis themselves pick up the pieces. It would be an ugly and costly scenario. But the credible threat of it might be the one thing that tips Iraq's polarized parties toward accommodation. And bad as it would be for a time, it could hardly be worse than having the United States bogged down in Iraq, desperately holding our military fingers in the dike for the decades that Senator McCain seems prepared to envision, while both our military capacity and our soft power drain away.