Stephen Wertheim is a senior fellow in the American Statecraft Program at the Carnegie Endowment for International Peace and the author of Tomorrow, the World: The Birth of U.S. Global Supremacy.
U.S. President-elect Joe Biden and his planned nominee for secretary of state, Antony Blinken, look on during an event introducing key foreign-policy and national security members of the incoming Biden-Harris administration in Wilmington, Delaware, on Nov. 24.
North Korean leader Kim Jong Un walks with U.S. President Donald Trump during a break in their historic summit in Singapore on June 12, 2018. (Saul Loeb/AFP/Getty Images)
