Book excerpt: Hollywood's Overseas Campaign: The North Atlantic Movie Trade, 1920-1950 examines how Hollywood movies became one of the most successful U.S. exports, a phenomenon that began during World War I. Focusing on Canada, the market closest to the United States, on Great Britain, the biggest market, and on the U.S. movie industry itself, Ian Jarvie documents how fear of this mass medium's impact and covetousness toward its profits motivated many nations to resist the cultural invasion and economic drain that Hollywood movies represented.