Mustaine is the band's primary songwriter. He develops songs starting with a particular riff that, with modifications, becomes the central part of the song. He has said that song fragments are composed separately, and then the band makes a compact structure from them. Drummer Shawn Drover stated that Mustaine had saved many riffs over the years and that some recent material is based on those demo recordings. Ellefson stated that the band constantly creates new material, and that making a recording begins with exchanging ideas after which the band enters the studio and discusses the concept, direction, artwork, and song titles. The lyrics are usually written after the music is arranged. Discussing the band's lyrics, Mustaine said that many of the themes are derived from literature, such as the novels of George Orwell.