Apocalyptical prayer first offered to the Mamas And Papas, then The Byrds, who both declined it. See: California Dreamin'.
Barry McGuire [n°1 US]
Claude François [as Ce monde absurde]
Spokesmen [as right wing answer song Dawn Of Correction]
Turtles [the author's first choice following The Byrds' refusal]
Gino Santercole [as Questo Vecchio Pazzo Mondo]
Dickies [punk parody]
For more P.F. Sloan originals, see: Take Me For What I'm Worth, Where Were You When I Needed You and You Baby.