Asia & the Pacific

The defining question about global order for this generation is whether China and the United States can escape Thucydides’s Trap. The Greek historian’s metaphor reminds us of the attendant dangers when a rising power rivals a ruling power—as Athens challenged Sparta in ancient Greece, or as Germany did Britain a century ago. Most such contests have ended badly, often for both nations, a team of mine at the Harvard Belfer Center for Science and International Affairs has concluded after analyzing the historical record. In 12 of 16 cases over the past 500 years, the result was war. When the parties avoided war, it required huge, painful adjustments in attitudes and actions on the part not just of the challenger but also the challenged.

Amid heightened fighting in eastern Ukraine this week, with separatist rebels gaining control of several checkpoints along the Russian border as well as various military bases in Luhansk, few observers are forecasting a peaceful resolution to the conflict anytime soon. Yet even as President Obama and Putin trade warnings alongside D-Day anniversary commemorations, the terms of an eventual agreement are not difficult to imagine.

Economics are an essential part of understanding climate change and for developing solutions to it. Robert Stavins and Rohini Pande focused on that idea at a Harvard Kennedy School "IDEASpHERE" event titled "Harnessing Market Forces to Protect the Climate."

In a Harvard Kennedy School IDEASpHERE session titled "Challenges to US Global Leadership," Graham Allison, Nicholas Burns, David Gergen, David Ignatius, and Meghan O’Sullivan discussed challenges as well as opportunities facing the United States. Burns moderated the session.

Challenges include the rise of China and the future of the U.S.-China relationship, the crises taking place around the world, and the reputation of the U.S. worldwide. An unexpected opportunity is the increase in available energy sources in the United States.

The last seven decades without war among the great powers – what historians describe as “the long peace” – is a remarkable achievement. “This is a rare and unusual fact if you look at the last few thousand years of history,” said Graham Allison, director of the Belfer Center and moderator of the IDEASpHERE panel “Winning the Peace.” “Furthermore, it is no accident. Wise choices by statesmen have contributed to ‘the long peace,’ which has allowed many generations to live their lives.”

The thought that what we are now witnessing in Ukraine could trigger a cascade of actions and reactions that end in war will strike most readers as fanciful. Fortunately, it is, writes Graham Allison. But we should not forget that in May 1914, the possibility that the assassination of an Archduke could produce a world war seemed almost inconceivable. History teaches that unlikely, even unimaginable events do happen.

The world “hungers” for American engagement and leadership, U.S. Deputy Secretary of State James Steinberg said in the first Future of Diplomacy Project interview, a series aimed at gaining insights on international affairs from prominent policy makers.