The Root of All Evil is a studio album by Swedish melodic death metal band Arch Enemy, featuring re-recorded songs from the first three albums by the band—Black Earth, Stigmata, and Burning Bridges. It was released on 28 September 2009 by Century Media Records and was made available as a jewel case CD, limited edition mediabook, digital media download and LP. The album was produced by the band themselves and mixed and mastered by Andy Sneap. All songs from this album are re-recordings, with the title track being another version of the instrumental Demoniality.

Arch Enemy is a Swedish melodic death metal band, originally a supergroup from Halmstad, formed in 1995. Its members were in bands such as Carcass, Armageddon, Carnage, Mercyful Fate, Spiritual Beggars, The Agonist, Nevermore, and Eucharist. It was founded by Carcass guitarist Michael Amott along with Johan Liiva, who were both originally from the death metal band Carnage. The band has released eleven studio albums, three live albums, three video albums and four EPs. The band was originally fronted by Johan Liiva, who was replaced by German vocalist Angela Gossow in 2000. Gossow left the band in March 2014 to become the group's manager and was replaced by Canadian vocalist Alissa White-Gluz.