Muse describes their music as "Christian gangsta rap jazz odyssey with some ambient rebellious dubstep and face-melting metal flamenco cowboy psychedelia." That about covers it. But most critics see them as alternative rock, often on the side of harder metal. "The 2nd Law" is their sixth album and the title refers to the Second Law of Thermodynamics, also known as entropy, or the state of disorder, which is probably why it appeals to hard rockers.