Like many of Arnold Zable's masterpieces, The Fighter is a multi-layered story which explores themes of displacement, memory, trauma, place, multiculturalism, and the Jewish historical experience. Likened to Bryce Courtenay's The Power of One, The Fighter tells the story of champion boxer-cum-social worker, Henry Nissen, and his mother, who survived the Holocaust but lost her battle with mental illness. Yet it also describes the author himself. A long-standing human rights activist, Arnold talks to Shirli Kirschner about writing and making a difference.