Axis of Justice is a non-profit organization co-founded by Tom Morello of Audioslave and Rage Against the Machine and Serj Tankian of System of a Down. Its purpose is to bring together musicians, fans of music, and grassroots political organizations to fight for social justice together. An Axis of Justice tent might appear at music festivals where either Audioslave or System of a Down are playing, as it did at Lollapalooza 2003. The Axis of Justice also puts out a monthly radio show that can be heard on KPFK in Los Angeles, California and on XM Satellite Radio. The shows are archived in MP3 format on the AOJ website and are available as free downloads.
In 2004, they released a live album/DVD entitled "Axis of Justice: Concert Series Volume 1". It contains performances by Flea from the Red Hot Chili Peppers, Brad Wilk and Chris Cornell from Audioslave, Serj Tankian from System of a Down, Pete Yorn, Tim Walker, Maynard James Keenan of Tool and A Perfect Circle, and Wayne Kramer among others. It was recorded during a concert at the Avalon in Los Angeles. The concert was a benefit to raise money for the Axis of Justice.