Toxicity is the second studio album by Armenian-American heavy metal band System of a Down, released on September 4, 2001, through American Recordings and Columbia Records. Expanding on its 1998 eponymous debut, it incorporated more melody, harmonies, and singing than the band's first album. Categorized primarily as alternative metal and nu-metal, Toxicity features elements of multiple genres, including folk, progressive rock, jazz, and Armenian and Greek music, including prominent use of instruments like the sitar, banjo, keyboards, and piano. It contains a wide array of political and non-political themes, such as mass incarceration, the CIA, the environment, police brutality, drug addiction, scientific reductionism, and groupies.

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