Published weekly without interruption since March 3, 1923, Time: The Weekly News-Magazine (the final word is no longer hyphenated) pioneered a new genre of publication that was invented in the United States after the First World War and spawned many imitators at home and abroad. Time was the first mass-circulation magazine to offer a weekly digest of current events and commentary organized into departments, written in an oft-parodied breezy, idiosyncratic style. As the inaugural publication in Henry Luce's publishing empire that within little more than a decade included Fortune, Life, and Architectural Forum, the periodical quickly established itself as a "lengthened shadow" of its founder, who maintained close control over its content and used it to shape public opinion toward accepting his views about the role of the United States in "the American Century." As such, it frequently was thought to be a Republican-oriented publication: it published highly favorable coverage...