System of a Down are a heavy metal band that originated in California, in 1994. The band consists of four members: Serj Tankian on vocals, Daron Malakian on guitar and vocals, Shavo Odadjian on bass, and John Dolmayan on drums. They are known for their unique and eclectic sound, combining heavy metal, punk rock, and progressive rock elements. Their music often features politically charged lyrics that touch on topics such as government corruption, war, and social injustice.