Over the ensuing decades, that faith in big units has eroded — in all spheres of life. Management hierarchies have been flattened. Today people are more likely to believe that history is driven by people gathering in the squares and not from the top down. The liberal order is not a single system organized and defended by American military strength; it’s a spontaneous network of direct people-to-people contacts, flowing along the arteries of the Internet.

The real power in the world is not military or political. It is the power of individuals to withdraw their consent. In an age of global markets and global media, the power of the state and the tank, it is thought, can pale before the power of the swarms of individuals.

This is global affairs with the head chopped off. Political leaders are not at the forefront of history; real power is in the swarm. The ensuing doctrine is certainly not Reaganism — the belief that America should use its power to defeat tyranny and promote democracy. It’s not Kantian, or a belief that the world should be governed by international law. It’s not even realism — the belief that diplomats should play elaborate chess games to balance power and advance national interest. It’s a radical belief that the nature of power — where it comes from and how it can be used — has fundamentally shifted, and the people in the big offices just don’t get it.