John Barry has written or edited numerous books, articles and book chapters on green political theory, the political economy of unsustainability, the green movement, the politics, economics and policy of the transition to a low carbon economy, republicanism and green politics, eco-feminism, Irish and Northern Irish politics and culture, interdisciplinary approaches to sustainability research, Q methodology and academic activism. He is a former co-chair of the Green Party in Northern Ireland, a sitting Green Party Councillor, a founding member of Holywood Transition Town, a director of the Association for the Study of Peak Oil (Ireland), and co-founder of two think tanks, Green House and the Centre for Progressive Economics. He is Reader in Politics in the School of Politics, International Studies and Philosophy and Associate Director of the Institute for a Sustainable World, both at Queen's University Belfast. He is winner of the PSA Mackenzie Prize for best politics book of 1999.