His militant pacifism is intimately linked to his atheism and his unconditional opposition to nationalism; he has been active in the WRI and in its British affiliate, the Peace Pledge Union (PPU), since the 1970s. He currently edits an international database of peace organisations, and is active (locally and nationally) on issues including housing, transport, sexual politics, free speech, cycling, and privatisation. His campaigning experience ranges from legal actions to direct action. He is a trustee of the building housing WRI's offices.