Intellectuals such as Susan Sontag were featured in the glossy pages of magazines like Vogue. Her controversial “Notes on Camp,” first published in 1964 in Partisan Review, exploded into public view when Time championed her work. Eggheads were suddenly sexy, almost on a par with star athletes and Hollywood celebrities. Gore Vidal was a regular on Johnny Carson. William F. Buckley Jr.’s “Firing Line” hosted vigorous debates that often were models of how to think, how to argue, and, at their best, told us that ideas mattered.