Paranoid is the second studio album by English heavy metal band Black Sabbath, released on 18 September 1970 by Vertigo Records in the United Kingdom and on 7 January 1971 by Warner Bros. Records in the United States. The album contains several of the band's signature songs, including "Iron Man", "War Pigs" and the title track, which was the band's only Top 20 hit, reaching number 4 on the UK charts.

Heavy metal is a genre of rock music that developed in the late 1960s and early 1970s, largely in the United Kingdom and United States. With roots in blues rock, psychedelic rock and acid rock, heavy metal bands developed a thick, monumental sound characterized by distorted guitars, extended guitar solos, emphatic beats and loudness.