Examining the role of transnational radio broadcasting in the 20th century, this study compares and contrasts the goals and objectives of six broadcast networks: the BBC, Radio Free Europe, Voice of America, Radio Marti, Radio Free Asia, and Vatican Radio. The work traces the evolution - technical and programmatic - at each institution through world events such as World War II, the Cold War, the Solidarity Movement, the democratization of the Eastern bloc, and Tiananmen Square. Utilizing a series of case studies provided by selected authorities, the study demonstrates the effect of radio upon differing societies. Also, it explores options for alternative programming for each network, emphasizing their relationships to the evolving international political and media community in the late-20th century. The work should be of interest to scholars and students of mass media and international relations.