The vigorous and non-discriminatory enforcement of antitrust law can contribute to promoting an international marketplace characterized by an open competitive process. However, antitrust law is, at best, a supporting player in constructing a liberal multilateral trading order, and is incapable of promoting any single country’s exports. This article suggests a small, but important, role for United States antitrust law in promoting that competitive marketplace in conjunction with a developing wave of competition law around the globe.