Insanity Reigns Supreme (IRS) is a Belgian doom metal band first formed in 1989.HistoryThe band's first incarnation was called Mental Defect, formed by Chris and Ron, both guitar players, and soon completed with Criz on vocals, Filip on drums and Chan on bass. However, due to the suicide of the latter late in 1989. This tragedy was very influential on the band's musical style, making it very emotional and dark.Two years later a first self-titled demo was recorded at the Music House stud