"Iron Man" is a signature song of Birmingham, England heavy metal pioneers Black Sabbath. It was first released on their second album Paranoid (1970) and later included on their initial greatest hits compilation We Sold Our Soul for Rock 'n' Roll (1976), as well as all subsequent greatest hits compilations. Many musical acts have recorded cover versions of the song, and the song is frequently used and referenced during sporting events and in television shows and films. The song is about a person who sacrifices himself to save mankind, but is later shunned by society. He eventually decides to take revenge on those people, "vengeance from the grave, killing the people he once saved."