Charles A. Kupchan mines the nation’s past to uncover the ideological and political roots of ongoing changes in U.S. foreign policy, including the sources of Donald J. Trump's “America First” doctrin…

Is America’s alliance system so quietly effective that politicians and voters fail to appreciate its importance in delivering the security they take for granted?

A mapping of the twenty-first-century world that provides a detailed strategy for reconciling the West with the "rise of the rest."

Where is the transatlantic security relationship headed? What key assumption should inform efforts to preserve it? Although policymakers have embarked on ambitious plans to enlarge NATO into central …