Mort Sahl, who confronted Eisenhower-era cultural complacency with acid stage monologues, delivering biting social commentary in the guise of a stand-up comedian and thus changing the nature of both stand-up comedy and social commentary, died on Tuesday October 26 2021 at his home in Mill Valley, Calif., near San Francisco. He was 94. Mr. Sahl had a long, up-and-down career. He faded out of popularity in the mid-1960s, when he devoted his time to ridiculing the Warren Commission report on the assassination of President John F. Kennedy; then, over the following decades, he occasionally faded back in. But before that he was a star and a cult hero of the intelligentsia. He recorded what the Library of Congress has cited as “the earliest example of modern stand-up comedy on record,” the album “At Sunset.” (Though recorded in 1955, it was not released until 1958, shortly after the release of his official first album, “The Future Lies Ahead.”) Morton Lyon Sahl was born in Montreal on May 11, 1927. His father, Harry, ran a tobacco shop, though he had grown up in New York as an aspiring playwright, and by the time Mort was 7, Harry Sahl had moved the family to Los Angeles and found work as a clerk for the Department of Justice. At 15, Mort joined the R.O.T.C. and left high school, lying about his age to join the Army; after two weeks, his mother, Dorothy, got him out. After high school, he enlisted again and served in the Army Air Forces in Alaska, where his anti-authoritarian impulse first flowered. Following his discharge, he attended Compton Junior College and the University of Southern California, earning a degree in city management, and then followed a young woman — Sue Babior, whom he would eventually marry — to Berkeley. Mr. Sahl was married and divorced four times, first to Ms. Babior; then to China Lee, the first Asian American model to be a Playboy centerfold, from whom he was divorced for the second time in 1991; and finally to Kenslea Motter, from whom he was divorced in 2009. Mr. Sahl and his second wife had a son, Mort Jr., who died in 1996 of a drug overdose. No immediate family members survive.