Robert Dennis Crumb (b. 1943) is an American cartoonist who has helped challenge and expand the boundaries of the graphic arts and redefined comics and cartoons as countercultural art forms. Widely circulated, often celebrated, Crumb’s published imagery, such as his comic strips Fritz the Cat, Mr. Natural, and Keep on Truckin’, offers a mordant satirical critique of modern society, directly addressing political disillusionment, the never-ending battles between "squares" and bohemians, racial and gender stereotypes, sexual fantasies and fetishes, and the absurdities of social convention and conformity—themes the artist also often explores through disturbing but hilariously abject self-caricature that dramatizes incidents in his own life and surroundings.