Donald Trump's United States is not isolationist. He has authorized the use of limited military force against the Syrian government in a manner his predecessor rejected.

Trade accords had been a staple of the post-World War II world, providing a mechanism for economic growth, development, and association with friends and allies, and a means of reining in would-be adversaries who otherwise would have little incentive to act with restraint.

Trump is the first post-World War II American president to view the burdens of world leadership as outweighing the benefits.

Richard N. Haass Quotes