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 at his home in Mill Valley, Calif., near San Francisco. He was 94. The death was confirmed by Lucy Mercer, a friend helping oversee his affairs. Gregarious and contentious — he was once described as “a very likable guy who makes ex-friends easily” — Mr. Sahl had a long, up-and-down career. He faded out of popularity in the mid-1960s, when he devoted his...