Lateralus ( /lætərˈælɪs/) is the third studio album by American rock band Tool. The album was released on 15 May 2001, and debuted at number one on the Billboard 200 chart. On 5 August 2003, Lateralus was certified double platinum by the RIAA. On 30 August 2004 the album was certified Silver by the BPI for sales of 60,000 in the UK. On 23 August 2005, Lateralus was released as a limited edition two-picture-disc vinyl LP in a holographic gatefold package. Lateralus was ranked #123 on the Rock and Roll Hall of Fame's "Definitive 200" list.
Lateralus emerged after a four-year legal dispute with Tool's label, Volcano Entertainment. In January 2001, the band announced that their new album's title would be Systema Encéphale and provided a 12-song tracklist with titles such as "Riverchrist", "Numbereft", "Encephatalis", "Musick", and "Coeliacus". File-sharing networks such as Napster were flooded with bogus files bearing the titles' names. At the time, Tool members were outspokenly critical of file-sharing networks in general due to the negative impact on artists that are dependent on success in record sales to continue their career. Keenan had this to say during an interview with NY Rock