David Ignatius

U.S. adversaries exploit power gaps. It's easier for Russia to invade Ukraine with irregular forces out of uniform, the so-called 'little green men,' than to send a conventional army that would challenge NATO.

After the collapse of the Soviet Union, the United States and China are more likely to view each other as competitors if not adversaries. But the die has not been cast. The best possible outcome is a new understanding that when they cannot cooperate, they will coexist and allow all countries in the Pacific to grow and thrive.