Jesus Christ Superstar is a sung-through rock opera with music by Andrew Lloyd Webber and lyrics by Tim Rice. Loosely based on the Gospel accounts of the Passion, the work interprets the psychology of Jesus and other characters, with much of the plot centred on Judas, who is dissatisfied with how Jesus steers his disciples. Contemporary attitudes, sensibilities, and slang pervade the rock opera's lyrics, and ironic allusions to modern life are scattered throughout the depiction of political events; stage and film productions accordingly contain many intentional anachronisms.