Self-portrait by Thomas Nast, 1840-1902. German American caricaturist and editorial cartoonist, Nast is the 'father of the American Cartoon'. He's famous for his iconic depiction of Uncle Sam, the personification of the American people, pointing outwardly. He's also credited with the way we envisage Santa Claus. He illustrated for Harper's Weekly, where he produced many notable cartoons and illustrations of political jest.