System of a Down is an American rock band formed in 1994 in Los Angeles, California. The band consists of four members: Serj Tankian (vocals, keyboards), Daron Malakian (guitar, vocals), Shavo Odadjian (bass), and John Dolmayan (drums). They are known for their unique blend of heavy metal, alternative rock, and Armenian folk music, often incorporating political and social themes into their lyrics. The band's self-titled debut album was released in 1998, followed by several successful albums, including Toxicity (2001) and Mezmerize (2005). System of a Down gained widespread recognition for their energetic performances and thought-provoking songs, becoming influential figures in the rock music scene.