premise: Brad Wilk co-founded Rage five years before August 1991.
hypothesis: Brad Wilk . He is best known as the drummer of the rock bands Rage Against the Machine ( 1991 -- 2000 ; 2007 -- 11 ) and Audioslave ( 2001 -- 07 ) . Wilk started his career as a drummer for Greta in 1990 , and helped co-found Rage with Tom Morello and Zack de la Rocha in August 1991 . As of 2016 , he is playing in the band Prophets of Rage , with Commerford , Morello , Chuck D , B-Real and DJ Lord . Rage is a German heavy metal band , formed in 1984 by Peter `` Peavy '' Wagner .