Ian Matthias Bavitz, better known by his stage name Aesop Rock, is an American rapper and producer from Long Island, New York. He was at the forefront of the new wave of underground and alternative hip-hop acts that emerged during the late 1990s and early 2000s. He was signed to El-P's Definitive Jux label until it went on hiatus in 2010. In a 2010 retrospective, betterPropaganda ranked him at number 19 at the Top 100 Artists of the Decade.