Collier's was an American general interest magazine founded in 1888 by Peter Fenelon Collier. It was launched as Collier's Once a Week, then renamed in 1895 as Collier's Weekly: An Illustrated Journal, shortened in 1905 to Collier's: The National Weekly and eventually to simply Collier's. The magazine ceased publication with the issue dated the week ending January 4, 1957, although a brief, failed attempt was made to revive the Collier's name with a new magazine in 2012.

The muckrakers were reform-minded journalists, writers, and photographers in the Progressive Era in the United States (1890s–1920s) who claimed to expose corruption and wrongdoing in established institutions, often through sensationalist publications. The modern term generally references investigative journalism or watchdog journalism; investigative journalists in the US are occasionally called "muckrakers" informally.