aren't all classic albums made by drug / alcohol addicts ?
let's make a list. here's what i can think of (might be wrong)
Nirvana - Nevermind (cannabis / heroin)
Pink Floyd - DSOTM (cannabis)
Beatles - Sgt Pepper (cannabis / LSD)
Bob Marley & The Wailers - Catch a Fire (cannabis)
Jimi Hendrix - Electric Ladyland (heroin)
Metallica - Master of Puppets (alcohol)
Sex Pistols - Never Mind the Bollocks (heroin)
Jeff Buckley - Grace (heroin)
Radiohead - Kid A (cannabis)
...
here's a list of classic albums
The RS 500 Greatest Albums of All Time : Rolling Stone
the real question might be : what classic album was made WITHOUT drugs
and
do we have to take drugs to make a classic record ?