Black Sabbath’s second album, released in 1970, Paranoid is one of heavy metal’s birth certificates. Produced by Rodger Bain, it arrived the same year as the band’s debut and confirmed within weeks that Birmingham had just invented a new music: heavier, darker, built on the riffs of Tony Iommi. Recorded in London in a matter of days, the album captures a band still close to its blues roots yet already turned toward something far darker and heavier than anything then in existence.

The riff as foundation

It all starts with Iommi’s guitar. Fingers injured in a factory accident had led him to tune lower and play differently, and from that handicap came a thick, menacing tone that structures the whole album. Geezer Butler on bass and Bill Ward on drums thicken the base further, while Ozzy Osbourne lays a nasal, anxious voice over the top.

The record was meant to be titled War Pigs, after its opener, a broadside against the Vietnam War and those who profited from it. The name was changed at the last minute, but the song remains a model of dramatic build, from the crawling riff to the closing acceleration. Geezer Butler, the band’s chief lyricist, injects a social critique and an apocalyptic imagery that cut against the carefree tone of much of the era’s rock. War, fear and fatalism become recurring themes.

An accident turned hit

The title track, by contrast, was written in minutes to fill out the album’s running time. That stopgap became the band’s biggest hit: a simple riff, a lyric about dread and depression, under three minutes of urgency. The paradox is striking: the most improvised piece became the one everybody knows.

Around it the album unfurls high points: Iron Man and its relentless march, Electric Funeral and its post-nuclear vision, Hand of Doom on heroin among soldiers. Grim science fiction and social anxiety mingle throughout.

The cornerstone

It is hard to overstate the importance of Paranoid. Almost all later metal, from doom to stoner to thrash, carries a strand of its DNA. The heavy tempo, the occult atmosphere, the central place of the riff: Black Sabbath fixed all of it here for decades to come.

The record has lost none of its power, precisely because it did not aim to be perfect but to express something real, the fear and disgust of a working-class youth. Our score of 9.5 acknowledges a foundational album in the strict sense: without it, much of what this webzine covers would probably not exist in this form. Ozzy Osbourne, Tony Iommi, Geezer Butler and Bill Ward likely had no idea they were founding a whole genre, but that is exactly what they did. Half a century on, every riff still lands like a self-evident truth.