CBS rural purge paved way for 1970s sitcoms that shaped American television

The early 1970s television landscape in Portland, Maine, and across the country shifted abruptly when CBS removed its long-running country programming from the schedule. This strategic move, later termed the rural purge, eliminated shows such as Hee-Haw, Green Acres, and The Beverly Hillbillies. The network aimed to attract a more modern, urban audience with higher disposable income. This decision opened prime time slots for a new wave of issue-driven sitcoms that reflected real-life American problems.

This programming change coincided with the rise of Norman Lear, a producer whose shows moved beyond slapstick comedy to address social issues like race, war, and feminism. The shift allowed series to become cultural anchors for families watching on three primary channels. Four specific shows emerged from this era as defining examples of the decade's television quality and viewership numbers.

All in the Family, which premiered in January 1971, became the ratings leader for five consecutive seasons. The series, based on the British show Till Death Us Do Part, featured Carroll O'Connor as Archie Bunker. It introduced topics such as the Vietnam War and feminism into dinner table conversations. The show was the first sitcom to include the sound of a toilet flush. Lear later noted that while the network initially ran a disclaimer to calm potential viewer panic, no state seceded from the Union.

M*A*S*H ran for 11 seasons on television, a duration nearly four times longer than the actual Korean War. The series began as a 1968 novel by Dr. H. Richard Hornberger under the pen name Richard Hooker, drawing on his experience as a surgeon. Alan Alda starred as Hawkeye in the TV adaptation, which blended tragedy with comedy. The series finale, titled Goodbye, Farewell and Amen, aired on February 28, 1983, and drew 105 million viewers. It remains the most-watched scripted episode in U.S. history until the 2010 Super Bowl.

The Mary Tyler Moore Show, which aired from 1970 to 1977, established a template for workplace sitcoms. The series centered on Mary Richards, played by Mary Tyler Moore, who navigated a career in Minneapolis without a husband. The show's opening credits featured a hat toss on a street, set to a song written by Sonny Curtis. The series spawned multiple spinoffs, including Rhoda and Lou Grant, the latter of which was a dramatic hour-long series starring Ed Asner.

Happy Days, which ran from 1974 to 1984, transported audiences to 1950s Milwaukee. The show featured Ron Howard as Richie Cunningham and Henry Winkler as the character Fonzie. Fonzie's thumbs-up catchphrase became one of the most recognized phrases in television history. The series underwent a technical change after its first few seasons, shifting from single-camera filming to a live studio audience format. The show also famously erased the character Chuck Cunningham from the narrative after he left for college.