Morello and Serj Tankian of System of a Down are the co-founders of Axis of Justice, a political group whose declared purpose is "to bring together musicians, fans of music, and grassroots political organizations to fight for social justice together." They "aim to build a bridge between fans of music around the world and local political organizations to effectively organize around issues of peace, human rights, and economic justice." The group has worked for such causes as immigrant rights and death-penalty abolition. Its recommended book list includes such authors as Karl Marx, Che Guevara, George Orwell, Noam Chomsky, Mumia Abu-Jamal and Grant Morrison.