Crosby, Stills and Nash

Astrid Stawiarz, Getty Images

Ironically, this long-lasting supergroup was nearly finished after its first album in 1970. But after a brief split, these politically conscious rockers reformed and endured, influencing a generation of artists to write music that matters. Various solo projects, other collaborations and occasional work with Neil Young have kept the band feeling fresh long after their tie-dyes faded.

In their favor: During David Crosby's well-publicized battle against drug addiction, his bandmates always stood by him.
Biggest threat: The tolls of that well-publicized battle against drug addiction.
Rating: 48