Al Capp veterans returning from the war. Capp was also involved with the Sister Kenny Foundation, which pioneered new treatments for polio in the 1940s. Serving in his capacity as honorary chairman, Capp made public appearances on its behalf for years, contributed free artwork for its annual fund-raising appeals, and entertained crippled and paraplegic children in children's hospitals with inspirational pep talks, humorous stories and sketches. In 1940, an RKO movie adaptation starred Granville Owen (later known as Jeff York) as Li'l Abner, with Buster Keaton taking the role of Lonesome Polecat, and featuring a title song with lyrics by Milton Berle.
Al Capp album features his interaction with students at Fresno State College (now California State University, Fresno) on such topics as "sensitivity training," "humanitarianism," "abstract art" (Capp hated it), and "student protest". The cover features a cartoon drawing by Capp of wildly dressed, angry hippies carrying protest signs with slogans like "End Capp Brutality," "Abner and Daisy Mae Smoke Pot," "Capp Is Over [30, 40, 50—all crossed out] the Hill!!," and "If You Like Crap, You'll Like Capp!" Highlights of the strip's final decades include "Boomchik" (1961), in which America's international prestige is saved by Mammy Yokum, "Daisy Mae Steps Out" (1966),