"Modern Primitive" is an American animated sitcom produced by Hanna-Barbera Productions. The series of films took place in the Stone Age of the Romantic Era and followed the activities of the title family, Flintstone and its neighbor Rubbles, who lived in caves adjacent to each other. It was first aired on ABC from September 30, 1960 to April 1, 1966, and was the first prime-time animated series to be shown on television. The continued popularity of "Modern Primitives" depends to a large extent on its modern and daily attention to the age setting in "Stele". "Flintstone" is the most economical, most successful, and longest-running online animated TV series in the past three decades. It continued this history until the premiere of "Simpsons" in late 1989. In 2013, "TV Guide" "Listed "Flintstone" as the second largest TV cartoon all day long.