He is currently president of Scientists for Global Responsibility (Australia), and Secretary of the World Citizens Association of Australia. He has long been interested in the problem of eliminating nuclear weapons, and in the ideal of democratic global governance as the only means to resolve this and other pressing global problems such as climate change. He continues to teach a general education course at UNSW on ‘Nuclear Arms, Peace and Global Governance’. He has written and published a book on these issues, entitled ‘A Global Parliament: Principles of World Federation’.