R. Crumb is an American cartoonist and illustrator known for his influential work in the underground comic movement of the 1960s and 1970s. He gained fame for his distinctive style and satirical commentary on American culture, often exploring themes of sexuality, consumerism, and counterculture. His most famous creations include Fritz the Cat and Mr. Natural. Born on August 30, 1943, in Philadelphia, Pennsylvania, Crumb's work has been both celebrated and criticized for its provocative content. He has contributed to various publications, including Zap Comix, and has influenced many artists in the comic book industry. Crumb's legacy continues to shape the world of alternative comics.