The fierce debate on immigration ignores a crucial reality -- what is happening to the United States is only one piece, although a big one, of a much larger global picture.

That hit me a couple of weeks ago when I was in Singapore. The Southeast Asian island nation has long been hailed as an economic model, the business capital for the entire region.

But it is an economy facing demographic peril. Its small population of 4 million is shrinking, thanks to a very low fertility rate. Prosperous Singaporean couples work hard, have fewer children and worry about how to take care of their aging parents. By 2050, Singapore will have a median age of over 52, one of the oldest in the world.

Singapore's answer is to import labor. A third of its workforce are migrants, from construction workers to maids. One out of seven households employs a domestic worker -- low-paid women mostly from neighboring Philippines and Indonesia.

Singapore tries to lure "talents'' -- highly skilled and affluent migrants -- to stay permanently. But the men hauling bricks and the maids washing laundry are in a separate class of temporary guest workers, with no chance to join Singaporean society. If a maid becomes pregnant, she is shipped out within seven days. Employers have to post bonds that must be paid should their servants break the rules and try to stay, putting them in the role of migrant police.

Problems of abuse of domestic workers, including physical and sexual violence and confinement, are serious enough to have prompted a report last December by Human Rights Watch.

Singapore's dependence on migrant labor and its guest-worker policy may be at the extreme end but it's very much on the global spectrum. Labor, like capital and goods before it, is part of a global market. The movement of people across borders in search of wages and work, most of it from developing countries to developed, is growing at a phenomenal pace.

The numbers are staggering. From 1980 to 2000, the number of migrants living in the developed world more than doubled from 48 million to 110 million. Migrants make up an average 12 percent of the workforce in high-income countries. About 4 million migrants cross borders illegally every year.

The demand for labor is driven in part by a demographic disaster -- the falling birth rates of developed countries. Almost all of those countries now have fertility rates that are well below 2.1, the level at which a population replaces itself. At the very low end are Hong Kong (0.94), Korea (1.22) and Singapore in Asia (1.24), along with much of Eastern Europe.

Low fertility means shrinking workforces and aging populations. Without migration, according to a recent study, Europe's population would have declined by 4.4 million from 1995 to 2000. Immigration accounted for 75 percent of U.S. population growth during the same period.

This movement of people cannot be stopped, certainly not by hundreds of miles of fences or even by tens of thousands of border guards. It is an issue that cries out for global cooperation, for common policies that cut across national boundaries. Already, we can benefit from looking at what has worked -- and not worked -- elsewhere.

A Global Commission on International Migration, formed in 2003 by the United Nations secretary-general, has taken an initial stab. Their report, issued last winter, supports the growth of guest-worker programs.

The Senate immigration bill now up for debate includes a provision for a guest-worker program. The bill is clearly preferable to the punitive and ineffective approach of the House version. But the Singapore experience -- and previous guest-worker programs like the German import of Turks -- should prompt second thoughts about going down this road.

One problem is that the guests don't leave. The United States has its own experience with this in the bracero program to import farmworkers, and more recently with the supposedly temporary H1-B visas used so extensively by the high-tech industry here in Silicon Valley.

Most troubling to me, these programs create an underclass of migrants who are never assimilated, as happened in Germany. It sets us on the Singapore road, encouraging inhumane policing mechanisms. And it is a gilded invitation to employers to depress the wages and incomes of American workers, and not just in the dirty jobs that are supposedly so hard to fill.

The United States has been rightfully proud of a tradition that treats all immigrants as citizens in the making. Rather than guest workers, isn't it more American to set realistic immigration quotas and enforce them fairly?

At a time of unusual US interest in south Asia it is useful to see how specialists there look at the two issues explored in this book -- the Kashmir conflict and south Asian nuclearisation. Twelve of the 15 contributors are US-based and therefore it is not surprising that the book is largely by Americans for Americans. But this does not detract from its value for Indians and Pakistanis, because the scholarship is impressive and analyses mostly free of bias. The volume contains 13 essays including a short introductory one by the editors. The remaining 12 are grouped into three parts.

The four essays in the first group (Pakistan: Politics and Kashmir) are "Islamic Extremism and Regional Conflict in South Asia" by Vali Nasr, "Constitutional and Political Change in Pakistan: The Military-Governance Paradigm" by Charles H. Kennedy, "The Practice of Islam in Pakistan and the Influence of Islam in Pakistani Politics" by C. Christine Fair and Karthik Vaidyanathan, and "Pakistan's Relations with Azad Kashmir and the Impact on Indo-Pakistani Relations" by Rifaat Hussain.

Vali Nasr provides a succinct account of how Islamic fervour and Islamic extremism grew in Pakistan after 1971 and how political players in the country, especially the army, tried to make use of it for domestic political and foreign policy gains. He provides a good analysis of how the Pakistani elite is torn between de-emphasising Islam for the sake of socioeconomic gains and stressing it for political advantage. In case of the army there is the additional factor of "jihadi" usefulness in pursuing regional strategic aims.

Charles Kennedy presents an interesting analysis of how the army captures power and holds on to it. He shows how Ayub Khan, Zia-ul-Haq and Musharraf have adopted essentially the same approach in this regard -- following the stages of making things legal, eliminating political opponents, becoming president, stressing local government, intimidating bureaucracy and judiciary, fixing the constitution and orchestrating elections. Two key observations he makes at the end are "the failure to develop a stable constitutional system is the fault of both Pakistan's military and civilian leadership" and that "constitutional stability can only be achieved if there is an accommodation between the interests of the two sets of actors."

Christine Fair and Karthik Vaidyanathan have tried to assess the influence of Islam in Pakistan partly on the basis of three polls conducted to gauge Muslim reaction to war against terrorism, and partly on the basis of interviews. Two noteworthy conclusions of the authors are that there is little popular support for extremist Islam in Pakistan (the good performance of MMA in the 2002 elections is rightly attributed to the political vacuum created by Musharraf and strong post-9/11 anti-Americanism), and that the Pakistan military's current effort to control, rather than eradicate, terrorism cannot work.

Rifaat Hussain has given a detailed account of India-Pakistan relations during 1979-2004, but his effort to explain Pakistan's relations with "Azad" J and K does not go beyond the little that is generally known. The lack of detailed, unbiased information about the society and politics of "Azad" J and K, which Pakistan pretends is not under its thumb, and of northern areas, which Pakistan has unabashedly incorporated into itself, is a major knowledge-gap that handicaps the search for peace in J and K.

The four essays in the second group (India: Politics and Kashmir) are "Who Speaks for India? The Role of Civil Society in Defining Indian Nationalism" by Ainslie T. Embrie, "Hindu Nationalism and the BJP: Transforming Religion and Politics in India" by Robert L. Hardgrave Jr., "Hindu Fundamentalism, Muslim Jihad and Secularism: Muslims in the Political Life of the Republic of India" by Barbara D Metcalf, and "Jammu and Kashmir in the Indian Union: Politics of Autonomy" by Chandrashekhar Dasgupta.

In his essay Ainslie Embrie has tried to explicate the complex relationship between the state and civil society in India. The tension and overlap between secular and Hindu nationalisms have been presented with deep understanding. The Gujarat massacres of 2002 have been explained in relation to the various constituents of the Sangh parivar. Indian attitudes to matters of sub-nationalism have been explained not only in relation to Kashmir but also to the north-east and Punjab.

Robert Hardgrave's essay covers much the same ground although the focus is more squarely on the BJP and the RSS. He speaks of sections within the RSS that want to align "Hindu" India with the west against Islam. At the same time he underscores how the demands of power have moderated the ideological temper of the BJP. Both Embrie and Hardgrave have written with western readers in mind and much of the ground they have covered would be familiar to Indians.

Barbara Metcalf's essay about Muslim Indians draws attention to the fact that the post-9/11 war against terrorism evoked no response from them, unlike the case with Muslims elsewhere. She has explained thoughtfully the reasons for this as well as for the rise in anti-Muslim sentiments in India from the 1980s. The contents of this essay can provide useful insights to Indians and Pakistanis. Metcalf warns that Hindu extremism can help recruit Muslim terrorists in Pakistan and Bangladesh and, in the long run, possibly within India itself. She also makes a case for declaring organisations like the VHP "terrorist" in the light of Gujarat killings.

Chandrashekhar Dasgupta's essay on J and K and autonomy is "balanced" by Indian standards. He writes that New Delhi should "accommodate Kashmiri demands for autonomy to the maximum extent compatible with the legitimate regional interests of Jammu and Ladakh and with the requirements of democracy and good governance in the state as a whole. The interests of Jammu and Ladakh can be protected by a mix of regional autonomy; devolution of power to lower (district, sub-divisional and panchayat) levels; and an equitable inter-regional revenue-sharing formula." But while offering this sound advice, Dasgupta has carefully steered clear of examining its practical implications.

The four essays in the final group (India's and Pakistan's Nuclear Doctrines and US Concerns) are "The Stability-Instability Paradox: Misperception, and Escalation Control in South Asia" by Michael Krepon, "Pakistan's Nuclear Doctrine" by Peter R. Lavoy, "Coercive Diplomacy in a Nuclear Environment: The December 13 Crisis" by Rajesh M. Basrur, and "US Interests in South Asia" by Howard B. Schaffer. In the reviewer's view, this is the most interesting of the three sections in the book and merits careful reading in both India and Pakistan.

Michael Krepon has explored the ramifications of the use of force by south Asia's nuclear-armed adversaries. He stresses the danger emanating from the two sides drawing (largely for public consumption, in the reviewer's view) opposing lessons from tests-of-will like the Kargil war and Operation Parakram. A useful point to note is how Krepon has, over the years, shifted stress from nuclear confidence building measures(CBMs) to conflict resolution in reducing nuclear risks in south Asia. This can be seen from the following sentences in his concluding paragraph: "Much could go badly wrong on the subcontinent unless Pakistan's security establishment reassesses its Kashmir policy and unless New Delhi engages substantively on Islamabad's concerns and with dissident Kashmiris" and "The best chance of defusing nuclear danger and controlling escalation lies in sustained and substantive political engagement." Nuclear CBMs can only do so much.

Nuclear Doctrine

Peter Lavoy's essay is a good piece on Pakistan's nuclear doctrine. He has listed eight separate "uses" for Pakistan's nuclear weapons. In specific relation to India, there are four, viz (i) Last resort weapons to prevent military defeat or loss of territory; (ii) Deterrent to conventional military attack; (iii) Facilitators of low-intensity conflict; and (iv) Tools to internationalise the Kashmir issue. He has drawn attention to the fact that Pakistan's nuclear "redlines" are vague which, the reviewer might add, is true of all countries that reserve the right of "first use."

Rajesh Basrur's essay is about the coercive and nuclear dimensions of Operation Parakram. His narrative of events, diplomatic moves and public statements is valuable for separating chaff from wheat. He has drawn attention to how much India's "compellence strategy" was played out through the US, which had forces in close vicinity. During the confrontation both India and Pakistan sought to "create a fear of nuclear war in the global community, especially the US". He also highlights the fact that India decided to withdraw its forces when Pakistan ceased "responding" to Indian pressure.

The book has no conclusion. The last essay is by Howard Schaffer on US interests in south Asia. Schaffer writes about how the relatively low US interest in the India-Pakistan hostile relationship began to climb in the 1980s when the threat of nuclear war entered the calculus. He says "The US has now come to regard Kashmir less in terms of the equities of the issue -- the lot of the Kashmiri people, the morality or immorality of the insurgency in the Kashmir Valley. Instead it sees the dispute primarily as a tinderbox that could be the flashpoint of a nuclear conflagration." He concludes his essay with the comment that "Washington's view of US interests in the region and the way it goes about promoting them" is unlikely to become more consistent than in the past. Both are valid observations and Indians and Pakistanis would do well to mull over their many implications.

It is not stated in the book, but this volume had its beginnings in a conference at the Asia-Pacific Research Centre in Stanford in early 2003. This was soon after Operation Parakram and before India-Pakistan relations began to thaw in late 2003. Although contributors have updated their narratives to mid-2004, the milieu in which the arguments have evolved was a period of considerable tension. The peace possibilities that have opened up in early 2004 and have got slowly augmented since have, therefore, not been adequately factored in. The book has avoided making any kind of prediction about peace prospects in south Asia although the very title of the book leads the reader to expect some exploration in this area.

In the old popular song about the rout by Americans at New Orleans during the War of 1812, the British "ran so fast the hounds couldn't catch 'em." Even allowing for patriotic hyperbole, it can hardly be argued that the British extricated themselves with a great deal of dignity, particularly given that another battle in the same war inspired the American national anthem.

The impact of that defeat on the British national psyche is now obscure, but nearly two centuries later, as the Americans and their British allies seek to extricate themselves from Iraq, the story of how a superpower looks for a dignified way out of a messy and often unpopular foreign conflict has become a historical genre of sorts. As the pressure to leave Iraq increases, that genre is receiving new and urgent attention.

And in the shadow of the bleak and often horrific news emerging from Iraq nearly every day, historians and political experts are finding at least a wan hope in those imperfect historical analogies. Even in the absence of a sudden and dramatic shift on the battlefield toward a definitive victory, there may still be a slight opening, as narrow as the eye of a needle, for the United States to slip through and leave Iraq in the near future in a way that will not be remembered as a national embarrassment.

Most of the recent parallels do not seem to offer much encouragement for a confounded superpower that wants to save face as it cuts its losses and returns home. Among them are the wrenching French pullout from Algeria, the ill-fated French and American adventures in Vietnam, the Soviet humiliation in Afghanistan and the disastrous American interventions in Beirut and Somalia.

Still, there are a few stories of inconclusive wars that left the United States in a more dignified position, including the continuing American presence in South Korea and the NATO peacekeeping mission in Bosnia. But even those stand in stark contrast to the happier legacy of total victory during World War II.

The highly qualified optimism of these experts about what may still happen in Iraq - let's call it something just this side of hopelessness - has been born of many factors, including greatly reduced expectations of what might constitute not-defeat there. The United States already appears willing to settle - as if it were in a relationship that had gone sour but cannot quite be resolved by a walk out the door, punctuated with a satisfying slam.

Alongside the dampening of hopes, there has also been a fair amount of historical revisionism regarding the darker tales of conflicts past: a considered sense that if the superpowers had made different decisions, things could have turned out more palatably, and that they still might in Iraq.

Maybe not surprisingly, Vietnam is the focus of some of the most interesting revisionism, including some of it immediately relevant to Iraq, where the intensive effort to train Iraqi security forces to defend their own country closely mirrors the "Vietnamization" program in South Vietnam. If Congress had not voted to kill the financing for South Vietnam and its armed forces in 1975, argues Melvin R. Laird in a heavily read article in the current issue of Foreign Affairs, Saigon might never have fallen.

"Congress snatched defeat from the jaws of victory by cutting off funding for our ally in 1975," wrote Mr. Laird, who was President Nixon's defense secretary from 1969 to 1973, when the United States pulled its hundreds of thousands of troops out of Vietnam.

In an interview, Mr. Laird conceded that the American departure from Vietnam was not a pretty sight. "Hell, the pictures of them getting in those helicopters were not good pictures," he said, referring to the chaotic evacuation of the American embassy two years after Vietnamization was complete, and a year after Nixon resigned. But on the basis of his what-if about Vietnam, Mr. Laird does not believe that all is lost in Iraq.

"There is a dignified way out, and I think that's the Iraqization of the forces over there," Mr. Laird said, "and I think we're on the right track on that."

Many analysts have disputed the core of that contention, saying that large swaths of the Iraqi security forces are so inept they may never be capable of defending their country against the insurgents without the American military backing them up. But Mr. Laird is not alone in his revisionist take and its potential application to Iraq.

William Stueck, a history professor at the University of Georgia who has written several books on Korea, calls himself a liberal but says he buys Mr. Laird's basic analysis of what went wrong with Vietnamization.

Korea reveals how easy it is to dismiss the effectiveness of local security forces prematurely, Mr. Stueck said. In 1951, Gen. Matthew Ridgeway felt deep frustration when Chinese offensives broke through parts of the line defended by poorly led South Korean troops.

But by the summer of 1952, with intensive training, the South Koreans were fighting more effectively, Mr. Stueck said. "Now, they needed backup" by Americans, he said. By 1972, he said, South Korean troops were responsible for 70 percent of the front line.

Of course, there are enormous differences between Iraq and Korea. Korean society was not riven by troublesome factions, as Iraq's is, and the United States was defending an existing government rather than trying to create one from scratch.

Another intriguing if imperfect lesson can be found in Algeria, said Matthew Connelly, a Columbia University historian. There, by March 1962, the French had pulled out after 130 years of occupation.

That long colonial occupation, and the million European settlers who lived there before the bloody exodus, are major differences with Iraq, Mr. Connelly noted. But there were also striking parallels: the insurgency, which styled its cause as an international jihad, broke down in civil war once the French pulled out; the French, for their part, said theirs was a fight to protect Western civilization against radical Islam.

Like President Bush in Iraq, President Charles de Gaulle probably thought he could settle Algeria in his favor by military means, Dr. Connelly said. In the short run, that turned out to be a grave miscalculation, as the occupation crumbled under the insurgency's viciousness.

Over the long run, though, history treated de Gaulle kindly for reversing course and agreeing to withdraw, Mr. Connelly said. "De Gaulle loses the war but he wins in the realm of history: he gave Algeria its independence," he said. "How you frame defeat, that can sometimes give you a victory."

The Americans in Beirut and the Soviets in Afghanistan are seen, even in the long view, as cases of superpowers paying the price of blundering into a political and social morass they did not understand.

For the Soviets, that mistake was compounded when America outfitted Afghan rebels with Stinger missiles capable of taking down helicopters, nullifying a key Soviet military superiority. "I don't think they had a fig leaf of any kind," said Henry Rowen, a fellow at the Institute for International Studies at Stanford who was assistant secretary of defense for international security affairs from 1989 to 1991. "They just left."

In Beirut, the Americans entered to protect what they considered a legitimate Christian-led government and ended up, much as in Iraq, in the middle of a multipronged civil conflict. In October 1983, a suicide attack killed 241 American servicemen at a Marines barracks, and four months after that, with Muslim militias advancing, President Ronald Reagan ordered the remaining marines withdrawn to ships off the coast, simply saying their mission had changed. The episode has been cited by Vice President Dick Cheney as an example of a withdrawal that encouraged Arab militants to think the United States is weak.

Today, even as expectations for Iraq keep slipping, some measure of victory can still be declared even in a less-than-perfect outcome, said Richard Betts, director of the Saltzman Institute of War and Peace Studies at Columbia. For example, he said, an Iraqi government that is authoritarian but not totalitarian might have to do.

The key point, he said, is that under those circumstances, the outcome "doesn't look like a disaster even if it doesn't look good."