For several years, President Obama has operated under a set of assumptions about the Middle East: First, there could be no return of U.S. ground troops in sizeable numbers to the region; and second, the United States had no interests in the region great enough to justify such a renewed commitment. The crises in the Middle East could be kept localized. The core elements of the world order would not be affected, and America’s own interests would not be directly threatened.

These assumptions could have been right, but instead they have proven to be wrong. The combined crises of Syria, Iraq, and the threat posed by the Islamic State (or ISIS) have not been contained. ISIS itself has proven both durable and capable, as the attacks in Paris showed. The Syrian conflict—with the resulting refugee flows—is destabilizing Lebanon and Jordan; it has put added pressure on Turkey’s already tenuous democracy; and it has exacerbated the acute conflict between Sunni and Shiite across the region. The multi-sided war in the Middle East has now ceased to be a strictly Middle Eastern problem. It has become a European problem, as well. The crisis on the periphery, in short, has now spilled over into the core.

Does this not call for a reassessment of the policies that have so far been tried in Syria and Iraq? Have not events in the Middle East, and now in Europe, reached the point where significant interests are at stake, thereby requiring a more substantial response by the United States?

Read Robert Kagan's more in-depth article on the subject in the Wall Street Journal.

Editors’ Note: The economic, political, and security strategy that the United States has pursued for more than seven decades is under attack by leading political candidates in both parties, write Ivo Daalder and Robert Kagan. But the United States plays an essential role in supporting the international environment from which Americans benefit greatly. This article originally appeared in The Washington Post.

The economic, political and security strategy that the United States has pursued for more than seven decades, under Democratic and Republican administrations alike, is today widely questioned by large segments of the American public and is under attack by leading political candidates in both parties. Many Americans no longer seem to value the liberal international order that the United States created after World War II and sustained throughout the Cold War and beyond. Or perhaps they take it for granted and have lost sight of the essential role the United States plays in supporting the international environment from which they benefit greatly. The unprecedented prosperity made possible by free and open markets and thriving international trade; the spread of democracy; and the avoidance of major conflict among great powers: All these remarkable accomplishments have depended on sustained U.S. engagement around the world. Yet politicians in both parties dangle before the public the vision of an America freed from the burdens of leadership.

What these politicians don’t say, perhaps because they don’t understand it themselves, is that the price of ending our engagement would far outweigh its costs. The international order created by the United States today faces challenges greater than at any time since the height of the Cold War. Rising authoritarian powers in Asia and Europe threaten to undermine the security structures that have kept the peace since World War II. Russia invaded Ukraine and has seized some of its territory. In East Asia, an increasingly aggressive China seeks to control the sea lanes through which a large share of global commerce flows. In the Middle East, Iran pursues hegemony by supporting Hezbollah and Hamas and the bloody tyranny in Syria. The Islamic State controls more territory than any terrorist group in history, brutally imposing its extreme vision of Islam and striking at targets throughout the Middle East, North Africa and Europe. None of these threats will simply go away. Nor will the United States be spared if the international order collapses, as it did twice in the 20th century. In the 21st century, oceans provide no security. Nor do walls along borders. Nor would cutting off the United States from the international economy by trashing trade agreements and erecting barriers to commerce.

In the 21st century, oceans provide no security. Nor do walls along borders. Nor would cutting off the United States from the international economy by trashing trade agreements and erecting barriers to commerce.

Instead of following the irresponsible counsel of demagogues, we need to restore a bipartisan foreign policy consensus around renewing U.S. global leadership. Despite predictions of a “post-American world,” U.S. capacities remain considerable. The U.S. economy remains the most dynamic in the world. The widely touted “rise of the rest”—the idea that the United States was being overtaken by the economies of Brazil, Russia, India and China—has proved to be a myth. The dollar remains the world’s reserve currency, and people across the globe seek U.S. investment and entrepreneurial skills to help their flagging economies. U.S. institutions of higher learning remain the world’s best and attract students from every corner of the globe. The political values that the United States stands for remain potent forces for change. Even at a time of resurgent autocracy, popular demands for greater freedom can be heard in Russia, China, Iran and elsewhere, and those peoples look to the United States for support, both moral and material. And our strategic position remains strong. The United States has more than 50 allies and partners around the world. Russia and China between them have no more than a handful.

The task ahead is to play on these strengths and provide the kind of leadership that many around the world seek and that the American public can support. For the past two years, under the auspices of the World Economic Forum, we have worked with a diverse, bipartisan group of Americans and representatives from other countries to put together the broad outlines of a strategy for renewed U.S. leadership. There is nothing magical about our proposals. The strategies to sustain the present international order are much the same as the strategies that created it. But they need to be adapted and updated to meet new challenges and take advantage of new opportunities.

The widely touted “rise of the rest”—the idea that the United States was being overtaken by the economies of Brazil, Russia, India and China—has proved to be a myth.

For instance, one prime task today is to strengthen the international economy, from which the American people derive so many benefits. This means passing trade agreements that strengthen ties between the United States and the vast economies of East Asia and Europe. Contrary to what demagogues in both parties claim, ordinary Americans stand to gain significantly from the recently negotiated Trans-Pacific Partnership. According to the Peterson Institute for International Economics, the agreement will increase annual real incomes in the United States by $131 billion. The United States also needs to work to reform existing international institutions, such as the International Monetary Fund, so that rising economic powers such as China feel a greater stake in them, while also working with new institutions such as the Asian Infrastructure Investment Bank to ensure that they reinforce rather than undermine liberal economic norms.

The revolution in energy, which has made the United States one of the world’s leading suppliers, offers another powerful advantage. With the right mix of policies, the United States could help allies in Europe and Asia diversify their sources of supply and thus reduce their vulnerability to Russian manipulation. Nations such as Russia and Iran that rely heavily on hydrocarbon exports would be weakened, as would the OPEC oil cartel. The overall result would be a relative increase in our power and ability to sustain the order.

The world has come to recognize that education, creativity and innovation are key to prosperity, and most see the United States as a leader in these areas. Other nations want access to the American market, American finance and American innovation. Businesspeople around the world seek to build up their own Silicon Valleys and other U.S.-style centers of entrepreneurship. The U.S. government can do a better job of working with the private sector in collaborating with developing countries. And Americans need to be more, not less, welcoming to immigrants. Students studying at our world-class universities, entrepreneurs innovating in our high-tech incubators and immigrants searching for new opportunities for their families strengthen the United States and show the world the opportunities offered by democracy.

Americans need to be reminded what is at stake.

Finally, the United States needs to do more to reassure allies that it will be there to back them up if they face aggression. Would-be adversaries need to know that they would do better by integrating themselves into the present international order than by trying to undermine it. Accomplishing this, however, requires ending budget sequestration and increasing spending on defense and on all the other tools of international affairs. This investment would be more than paid for by the global security it would provide.

All these efforts are interrelated, and, indeed, a key task for responsible political leaders will be to show how the pieces fit together: how trade enhances security, how military power undergirds prosperity and how providing access to American education strengthens the forces dedicated to a more open and freer world.

Above all, Americans need to be reminded what is at stake. Many millions around the world have benefited from an international order that has raised standards of living, opened political systems and preserved the general peace. But no nation and no people have benefited more than Americans. And no nation has a greater role to play in preserving this system for future generations.

I had the pleasure earlier this month of welcoming my friend, Czech Republic Foreign Minister Lubomir Zaoralek, here to Brookings for a discussion of critical issues confronting the Europe-U.S. alliance. Foreign Minister Zaoralek was appointed to his current position in January 2014 after serving as a leading figure in the Czech Parliament for many years. He was accompanied by a distinguished delegation that included Dr. Petr Drulak of the Foreign Ministry, and Czech Ambassador Petr Gandalovic. I was fortunate enough to be joined in the discussion by colleagues from Brookings including Fiona Hill, Shadi Hamid, Steve Pifer, and others, as well as representatives of other D.C. think tanks. Our discussion spanned the globe, from how to respond to the Syrian conflict, to addressing Russia’s conduct in Ukraine, to the thaw in U.S.-Cuba relations, to dealing with the refugee crisis in Europe. The conversation was so fascinating that the sixty minutes we had allotted flew by and we ended up talking for two hours—and we still just scratched the surface.

Amb. Eisen and FM Zaoralek, October 2, 2015

Yesterday, we had a visit from Czech State Secretary Tomas Prouza, accompanied by Ambassador Martin Povejsil, the Czech Permanent Envoy to the EU. We also talked about world affairs. In this case, that included perhaps the most important governance matter now confronting the U.S.: the exceptionally entertaining (if not enlightening) presidential primary season. I expressed my opinion that Vice President Biden would not enter the race, only to have him prove me right in his Rose Garden remarks a few hours later. If only all my predictions came true (and as quickly). We at Brookings benefited greatly from the insights of both of these October delegations, and we look forward to welcoming many more from every part of the Czech political spectrum in the months ahead.

Prouza, Eisen, Povejsil, October 21, 2015

Professor Riek Machar, former vice president of South Sudan and now leader of the rebel group that is fighting the government of South Sudan for control of the apparatus of the government, has publicly threatened to capture and take control of both the capital city of Juba and the oil-producing regions of the country. Branding South Sudan’s president, Salva Kiir, a “dictator” and arguing that he does not recognize the need to share power, Professor Machar stated that the present conflict, which has lasted for more than five months and resulted in the killing of many people and the destruction of a significant amount of property, will not end until Kiir is chased out of power.

Violent mobilization by groups loyal to Machar against the government in Juba began in December 2013. It was only after bloody confrontations between the two parties that targeted civilians based on their ethnicity had resulted in the deaths of many people (creating a major humanitarian crisis) that a cease-fire agreement was signed in Addis Ababa on January 23, 2014, with the hope of bringing to an end the brutal fighting. The cease-fire, however, was seen only as the first step towards negotiations that were supposed to help the country exit the violent conflict and secure institutional arrangements capable of guaranteeing peaceful coexistence.

If Machar and his supporters have the wherewithal to carry out the threats and successfully do so, there is no guarantee that peace would be brought to the country. For one thing, any violent overthrow of the government would only engender more violence as supporters of Kiir and his benefactors are likely to regroup and attempt to recapture their lost political positions. What South Sudan badly needs is an institutionalization of democracy and not a government led by political opportunists. In fact, an effective strategy to exit from this incessant violence must be centered around the election of an inclusive interim government—minus both Kiir and Machar—that would engage all of the country’s relevant stakeholders in negotiations to create a governing process that adequately constrains the state, establishes mechanisms for the peaceful resolution of conflict, enhances peaceful coexistence, and provides an enabling environment for the rapid creation of the wealth needed to deal with poverty and deprivation.

On March 9, 2012, less than a year after South Sudan gained independence, then-Vice President Machar met with several Brookings scholars, including myself, in New York City. The meeting was part of the new country’s efforts to seek assistance from its international partners to address complex and longstanding development challenges, including critical issues such as the effective management of the country’s natural resource endowments, gender equity, the building of government capacity to maintain law and order, the provision of other critical public goods and services, and poverty alleviation. Among participants in this critical consultation were Mwangi S. Kimenyi, senior fellow and director of the Africa Growth Initiative (AGI) at the Brookings Institution; Witney Schneidman, AGI nonresident fellow and former deputy assistant secretary of state for African Affairs; and me. The vice president, who appeared extremely energetic and optimistic about prospects for sustainable development in the new country, requested an analysis of the commitments and achievements that the government of South Sudan had made since independence and suggestions for a way forward. The scholars, working in close collaboration with their colleagues at Brookings, produced a policy report requested by the vice president. The report entitled, South Sudan: One Year After Independence—Opportunities and Obstacles for Africa’s Newest Country, was presented at a well-attended public event on July 28, 2012. Panelists included Peter Ajak, director of the Center for Strategic Analyses and Research in Juba; Ambassador Princeton Lyman, U.S. special envoy for South Sudan and Sudan; Nada Mustafa Ali scholar at the New School for Social Research; Mwangi S. Kimenyi and me.

The report provided a comprehensive review of the policy issues requested by the vice president—the provision of basic services; future engagement between South Sudan and the Republic of Sudan; efficient and equitable management of natural resources; ethnic diversity and peaceful coexistence; federalism; eradication of corruption; and the benefits of regional integration. Most important is the fact that the report placed emphasis on the need for the government of South Sudan to totally reconstruct the state inherited from the Khartoum government through democratic constitution making and produce a governing process that (i) guarantees the protection of human and fundamental rights, including those of vulnerable groups (e.g., women, minority ethnic groups); (ii) adequately constrains the government (so that impunity, corruption and rent seeking are minimized); (iii) enhances entrepreneurial activities and provides the wherewithal for wealth creation and economic growth; and (iv) establishes mechanisms for the peaceful resolution of conflict and creates an environment within which all of the country’s diverse population groups can coexist peacefully.

Unfortunately, when the report was completed, members of the ruling Sudan People’s Liberation Movement were already embroiled in a brutal power struggle that eventually led to President Kiir sacking his entire cabinet, including the vice president. The collapse of the government raised the prospects of violent and destructive mobilization by groups that felt the president’s actions were marginalizing them both economically and politically. The ensuing chaos created an environment that was hardly conducive to the implementation of policies such as those presented in the Brookings report.

The government of Sudan has failed to engage in the type of robust institutional reforms that would have effectively prevented President Kiir and his government from engaging in the various opportunistic policies that have been partly responsible for the violence that now pervades the country. South Sudan’s diverse ethnic groups put forth a united front in their war against Khartoum for self-determination. Following independence, the new government engaged in state formation processes that did not provide mechanisms for all individuals and groups to compete fairly for positions in the political and economic systems. Instead, the government’s approach to state formation politicized ethnic cleavages and made the ethnic group the basis and foundation for political, and to a certain extent, economic participation. This approach has created a "sure recipe for breeding ethnic antagonism," and has led to the crisis that currently consumes the country.

While the most important policy imperative in South Sudan today is the need to make certain that the cease-fire continues to hold, long-term prospects for peaceful coexistence and development call for comprehensive institutional reforms to provide the country with a governing process that guarantees the rule of law. Hence, both the opposition and the government—the two sides in the present conflict—should take advantage of the cease-fire and start putting together the framework that will eventually be used to put the state back together. A new interim government, without the participation of the two protagonists—Kiir and Machar—should be granted the power to bring together all of the country’s relevant stakeholders to reconstitute and reconstruct the state, including negotiating a permanent constitution.

Dear South Sudan's Leaders:

Today, the country that all of you and your fellow citizens fought to establish is at a crossroads. And you, the country’s leaders, are now standing at the proverbial “fork in the road.” The question now is: Which road will each of you take? Your choice will determine not only your place in history but will significantly impact the future of your shared country, its diverse peoples and your neighbors. Each of you can choose to chase after personal power, primitive accumulation, and self-enrichment—using the ethnic group that you belong to as a foundation for that quest. This disastrous decision would plunge your country further into violent and destructive mobilization, effectively shutting the door to the type of state formation that is undergirded by a desire to achieve national integration, peaceful coexistence and sustainable development. Alternatively, each of you can opt to maximize a different value, one that places you among the world’s greatest leaders—that is, those who, when they came to the fork in the road, chose to lead their people down the road of opportunities for peaceful coexistence, prosperity and liberty.

As the citizens of South Sudan watch and wait in utter fear and disgust, it is time for you, the country’s leaders, to decide whether you want to lead them into a future filled with unending violence, hunger, and desolation, or into one where all of the country’s various peoples, regardless of their ethnic or religious affiliation, gender, and economic status, can live together peacefully and pursue their values and interests without molestation from others.

In the early 1990s, Nelson Mandela and his compatriots found themselves at a similar crossroads. They chose not to act opportunistically and retreat to their various ethnic enclaves.  Like the great leaders that history has proven them to be, they knew that, as apparently beneficial as such an option would have been to them, they would have plunged their country into an abyss from which it was unlikely to recover anytime soon. Instead, they chose the road that led them and their country to the type of state formation that is undergirded by institutional arrangements that provide an enabling environment for wealth creation and economic growth. That is why, today, the country that they founded has one of the world’s most progressive and human-rights friendly constitutions.

South Sudan is a new and relatively underdeveloped country, but it has the potential to emerge as a highly developed and peaceful one. However, in order for that potential to be fully exploited and used effectively to enhance development, the latter must be provided with institutional arrangements that guarantee the rule of law.

To you, the leaders of this new country: All of you can gracefully exit the scene, serve as elder statesmen, and provide the country’s new crop of leaders with the type of advice and support that can help the country successfully emerge from its violent and destructive past, as well as chart a path towards peace, sustainable economic growth and development, and equitable and fair allocation of national resources.

How will history judge you? As tyrants, opportunists, despots, exploiters, and oppressors, who used their public positions to grab power and riches for themselves or as public servants who spearheaded and led the transformative processes that brought peace, security, and development to their country? The choice is yours.

Posterity will judge you well, but only if you choose wisely!