In 1925, Harold Ross left his job reporting for the military magazine Stars and Stripes. He wanted to create a sophisticated publication for an urban readership, and what he came up with was The New Yorker. Ross’s devotion to the magazine ruined all three of his marriages, and yet his creation has lasted. A century old, the weekly is still a law unto itself: worldly, witty, literary. To commemorate this centennial, a new documentary narrated by Julianne Moore recounts the magazine’s major moments and outsized influence, meanwhile pulling back the curtain on how each issue is created. —Maggie Turner