United States antitrust law and policy diverges significantly from the rest of the global antitrust community in important areas of scope, philosophy, doctrine, procedure, remedies, and institutions. Much of this divergence in world view is the product of history and path dependence that is largely unique to the United States experience. At the same time, some of the divergences is the result of ideological choices over the past forty years that improbably have remained in place in the United States, while other politics, economics, values, and policy choices have come into prominence throughout the rest of the world.