U.N. Secretary-General Ban Ki-moon on Thursday urged Stanford students to become global citizens, working together beyond borders for peace, security and a common prosperity.

"You may come from the United States or Korea, Japan or elsewhere, Arab countries, but you're now part of a global family," Ban said to a crowded auditorium during his campus visit. "Therefore, it's very important to raise your capacity as global citizens. Only then, I think we can say, we're living in a very harmoniously prosperous world."

Despite a troubling tally of crises around the world, Ban was hopeful about the future, and said he gains inspiration from the younger generation.

"Everything my life has taught me points to the power of international solidarity to overcome any obstacle," he said.

Ban's speech, sponsored by Stanford's Freeman Spogli Institute for International Studies and the Walter H. Shorenstein Asia-Pacific Research Center, kicked off a series of events celebrating the 30th anniversary of the center.

Ban was introduced by former Secretary of Defense William Perry, an FSI senior fellow, who lauded Ban for his work on women's rights, climate change, nuclear disarmament and gay rights.

Ban told the audience that the world was undergoing massive changes and outlined three ways to navigate the transition: sustainable development, empowering young people and women, and pursuing dignity and democracy.

"The level and degree of global change that we face today is far more profound than at any other period in my adult lifetime," he said.

"We have no time to lose," he added later.

California, he said, has led on clean air legislation, creating a cap-and-trade law to reduce greenhouse gas emissions.

"I am convinced national and state action can spur progress in global negotiations, creating a virtuous cycle," he said.

"Syria is in a death spiral," he said. He cited the toll the conflict has taken on Syria's citizens and surrounding countries since the uprising against President Bashar al-Assad began in March 2011. More than 60,000 people, mostly civilians, have been killed. Hundreds of thousands more have been displaced.

Ban spoke at Stanford as a hostage crisis also unfolded in the region.

In retaliation for military action by France in the West African nation of Mali, Islamist extremists in Algeria took several hostages at an international gas field Thursday. News organizations reported that the kidnappers and some hostages were killed in a raid by the Algerian government.

Ban spoke of the efforts by the United Nations to counter terrorism in Mali, where Islamist rebels last year took control in the north in the chaos following a military coup that ousted the elected government of President Amadou Toumani Touré.

"We must continue to work for peace," Ban said. "Our hard work cannot be reversed, especially for women and young people."

With half the world's population under the age of 25, Ban said the international community must support and empower that group.

Ban also said that fighting for equality for lesbian, gay, bisexual and transgender communities was important in advancing peace and prosperity around the world.

"I have learned to speak out for one essential reason," he said. "Lives and fundamental values are at stake."

Ban told the students to harness a spirit of hope as they confront the challenges of the world.

For him, he said, that spirit was sparked by a visit to California decades ago. He reflected on an eight-day visit to the state in 1962, when he stayed with a family, the Pattersons, in Novato on a trip sponsored by the Red Cross.

"In many ways, I still carry the same energy and enthusiasm and sense of wonder that I did when I first landed on Miss Patterson's doorstep half a century ago," he said.

"I came back knowing what I wanted to do with my life and for my country," he said.

Ban said he still keeps in touch with his host, his "American mom," 95-year-old Libba Patterson, who was in the audience and stood to applause.

"It was here in California," he reflected to the students, "that I first felt I could grab the stars from the sky."

President Obama and Mitt Romney meet for their third debate to discuss foreign policy on Monday, when moderator Bob Schieffer is sure to ask them about last month's terrorist attack in Libya and the nuclear capabilities of Iran.

In anticipation of the final match between the presidential candidates, researchers from five centers at Stanford’s Freeman Spogli Institute for International Studies ask the additional questions they want answered and explain what voters should keep in mind.

What can we learn from the Arab Spring about how to balance our values and our interests when people in authoritarian regimes rise up to demand freedom?  

What to listen for: First, the candidates should address whether they believe the U.S. has a moral obligation to support other peoples’ aspirations for freedom and democracy. Second, they need to say how we should respond when longtime allies like Egypt’s Hosni Mubarak confront movements for democratic change.

And that leads to more specific questions pertaining to Arab states that the candidates need to answer: What price have we paid in terms of our moral standing in the region by tacitly accepting the savage repression by the monarchy in Bahrain of that country's movement for democracy and human rights?  How much would they risk in terms of our strategic relationship with Bahrain and Saudi Arabia by denouncing and seeking to restrain this repression? What human rights and humanitarian obligations do we have in the Syrian crisis?  And do we have a national interest in taking more concrete steps to assist the Syrian resistance?  On the other hand, how can we assist the resistance in a way that does not empower Islamist extremists or draw us into another regional war?  

Look for how the candidates will wrestle with difficult trade-offs, and whether either will rise above the partisan debate to recognize the enduring bipartisan commitment in the Congress to supporting democratic development abroad.  And watch for some sign of where they stand on the spectrum between “idealism” and “realism” in American foreign policy.  Will they see that pressing Arab states to move in the direction of democracy, and supporting other efforts around the world to build and sustain democracy, is positioning the United States on “the right side of history”?

~Larry Diamond, director of the Center on Democracy, Development, and the Rule of Law

What do you consider to be the greatest threats our country faces, and how would you address them in an environment of profound partisan divisions and tightly constrained budgets? 

What to listen for: History teaches that some of the most effective presidential administrations understand America's external challenges but also recognize the interdependence between America's place in the world and its domestic situation.

Accordingly, Americans should expect their president to be deeply knowledgeable about the United States and its larger global context, but also possessed of the vision and determination to build the country's domestic strength.

The president should understand the threats posed by nuclear proliferation and terrorist organizations. The president should be ready to lead in managing the complex risks Americans face from potential pandemics, global warming, possible cyber attacks on a vulnerable infrastructure, and failing states.

Just as important, the president needs to be capable of leading an often-polarized legislative process and effectively addressing fiscal challenges such as the looming sequestration of budgets for the Department of Defense and other key agencies. The president needs to recognize that America's place in the world is at risk when the vast bulk of middle class students are performing at levels comparable to students in Estonia, Latvia and Bulgaria, and needs to be capable of engaging American citizens fully in addressing these shared domestic and international challenges.

~Mariano-Florentino Cuéllar, co-director of the Center for International Security and Cooperation

Should our government help American farmers cope with climate impacts on food production, and should this assistance be extended to other countries – particularly poor countries – whose food production is also threatened by climate variability and climate change?

What to listen for: Most representatives in Congress would like to eliminate government handouts, and many would also like to turn away from any discussion of climate change. Yet this year, U.S. taxpayers are set to pay up to $20 billion to farmers for crop insurance after extreme drought and heat conditions damaged yields in the Midwest.

With the 2012 farm bill stalled in Congress, the candidates need to be clear about whether they support government subsidized crop insurance for American farmers. They should also articulate their views on climate threats to food production in the U.S. and abroad.

Without a substantial crop insurance program, American farmers will face serious risks of income losses and loan defaults. And without foreign assistance for climate adaptation, the number of people going hungry could well exceed 15 percent of the world's population. 

~Rosamond L. Naylor, director of the Center on Food Security and the Environment

What is your vision for the United States’ future relationship with Europe? 

What to listen for: Between the end of World War II and the end of the Cold War, it was the United States and Europe that ensured world peace. But in recent years, it seems that “Europe” and “European” have become pejoratives in American political discourse. There’s been an uneasiness over whether we’re still friends and whether we still need each other. But of course we do.

Europe and the European Union share with the United States of America the most fundamental values, such as individual freedom, freedom of speech, freedom to live and work where you choose. There’s a shared respect of basic human rights. There are big differences with the Chinese, and big differences with the Russians. When you look around, it’s really the U.S. and Europe together with robust democracies such as Canada and Australia that have the strongest sense of shared values.

So the candidates should talk about what they would do as president to make sure those values are preserved and protected and how they would make the cooperation between the U.S. and Europe more effective and substantive as the world is confronting so many challenges like international terrorism, cyber security threats, human rights abuses, underdevelopment and bad governance.

~Amir Eshel, director of The Europe Center

Historical and territorial issues are bedeviling relations in East Asia, particularly among Japan, China, South Korea, and Southeast Asian countries. What should the United States do to try to reduce tensions and resolve these issues?

What to listen for: Far from easing as time passes, unresolved historical, territorial, and maritime issues in East Asia have worsened over the past few years. There have been naval clashes, major demonstrations, assaults on individuals, economic boycotts, and harsh diplomatic exchanges. If the present trend continues, military clashes – possibly involving American allies – are possible.

All of the issues are rooted in history. Many stem from Imperial Japan’s aggression a century ago, and some derive from China’s more assertive behavior toward its neighbors as it continues its dramatic economic and military growth. But almost all of problems are related in some way or another to decisions that the United States took—or did not take—in its leadership of the postwar settlement with Japan.

The United States’ response to the worsening situation so far has been to declare a strategic “rebalancing” toward East Asia, aimed largely at maintaining its military presence in the region during a time of increasing fiscal constraint at home. Meanwhile, the historic roots of the controversies go unaddressed.

The United States should no longer assume that the regional tensions will ease by themselves and rely on its military presence to manage the situation. It should conduct a major policy review, aimed at using its influence creatively and to the maximum to resolve the historical issues that threaten peace in the present day.

~David Straub, associate director of the Korea Studies Program at the Walter H. Shorentein Asia-Pacific Research Center

Compiled by Adam Gorlick.