Energy

Thucydides attributed the war that ripped apart the ancient Greek world to two causes: the rise of Athenian power—and the fear that this created in the established power, Sparta. Joseph Nye advises that in order to prevent a new cold or hot war, the United States and China must avoid exaggerated fears and misperceptions about changing power relations.

Stephan Walt writes that Trump's foreign-policy instincts might be more sound—but he has forfeited the chance to lead.