Joseph W. Folk completed his education at Vanderbilt University and began his career as a clerk and bookkeeper in Memphis, Tennessee. He later joined his father's law firm, focusing on criminal law. Folk moved to St. Louis and became involved in local politics, eventually being elected as circuit attorney. During his tenure, he attacked local corruption and party machines, gaining national recognition. As Governor of Missouri, he implemented significant reforms, including antitrust prosecutions, improved election laws, and the establishment of several regulatory boards. Post-governorship, Folk returned to law practice, engaged in international arbitration, and held various public service roles.

Joseph W. Folk's political identity is marked by a distinctive blend of public morality and anti-corruption efforts, creating a unique ideological positioning that intertwines strict law enforcement with progressive social reforms. His approach reveals an unexpected convergence of progressive and conservative values, as seen in his enforcement of Sunday-closing laws alongside antitrust prosecutions. Folk's rhetorical style emphasizes popular control of law and strict enforcement, which he calls the "Missouri Idea," revealing a highly localized, disruption-oriented strategy aimed at rooting out corruption and promoting public morality.