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Capp made his fortune from the comic strip Li'l Abner, which he created in 1934. The strip quickly gained popularity and was syndicated in over 900 newspapers worldwide, making Capp one of the highest-paid cartoonists of his time. He used his wealth to fund various philanthropic projects, including the Al Capp Scholarship Fund for needy art students and the Capp Center for the Visual Arts in Pompano Beach, Florida.