Between 1944 and 2002, the United States sought to create a competitive and commercially driven international civil aviation regime. It tried to peel away politically inspired regulations, which fragmented the marketplace, and deliver efficiencies and consumer benefits. In contrast with the American liberal tradition-albeit with limitations-the industry in Europe was over-regulated and largely based on subsidised state-owned carriers with international market quotas. Thus for many years Europe and the U.S. followed different paths; but political and economic dynamics conspired together in the 1980s and early 1990s to produce remarkable change in the European Community and, by 1997, there were the makings of a competitive and lightly regulated single market, which brought it close to U.S. practice. Since 2002, the United States has been less liberal in its airline policies; the EU has been more liberal. It would be an irony indeed if the great regime liberaliser since 1944 were now to become a force of regulatory conservatism that denied consummation to the vision of a transatlantic open aviation area that could be a magnet to draw in the rest of the world into a truly global commercial airline market.