This sentiment dovetailed with a progressive current at the FCC, whose chair James Lawrence Fly spearheaded a number of initiatives-among them the Report on Chain Broadcasting that resulted in the breakup of the NBC radio network and the formation of the ABC radio network.
One subsequent initiative was a formalization of the rules of the social contract between radio broadcasters and the public; that crystallized as the Blue Book, which codified the thinking of the majority of FCC commissioners at the time.