This chapter’s focus is the nineteenth century, at the moment of ascendency of the popular magazine in capitalist print culture, when the essay achieved new prominence as well as a somewhat altered function as a marketable vehicle for literary criticism aimed at a popular audience. Edgar Allan Poe in particular harnessed the essay’s power to articulate a unique aesthetic philosophy and influenced generations of poet-essayists and poet-critics. While literary artists such as Lydia Maria Child, Ralph Waldo Emerson, Nathaniel Hawthorne, Margaret Fuller, Harriet Beecher Stowe, and Frederick Douglass exemplified the many writers whose innovations appeared in what one might call the philosophical, political, or ruminative essay, Poe worked assiduously to found his literary reputation not only on his poetry but on an innovative form of the magazine essay as an exercise in expert aesthetic criticism. Poe’s work as a literary critic working in and editing commercial magazines helped reshape both the popular and the critical sense of the nature and potential of literary art, especially poetry, in the modern world in ways that remain vital, if controversial, to both poets and critics today.