In this document, broadcast regulatory issues since 1940 are outlined and discussed in relation to social forces. The 1940s saw open warfare between the Federal Communications Commission (FCC) and broadcasters, as a result of the FCC expanding its powers. In 1946, the FCC issued its "Public Service Responsibility of Broadcast Licensees," which became known as "The Blue Book." During the 1950s, the FCC investigated broadcast performers and station owners for alleged communist activities and affiliations. Also in the fifties, concern developed over the relationship of television and juvenile delinquency and the control of advertising in the broadcast media. In 1961, with the appointment of Newton Minow as chair of the FCC, the Kennedy administration made clear its concern about the quality of television programming, and social scientists followed in an attempt to quantify and qualify the effects of television programming. By 1970, the theory of social responsibility of broadcasters had been thoroughly established by FCC Commissioner Nicholas Johnson, and under his direction the mass media concentrated on serving public interests. (LL)