Murray Bookchin is cofounder of the Institute for Social Ecology. An active voice in the ecology and anarchist movements for more than forty years, he has written numerous books and articles, including: Anarchism, Marxism and the Future of the Left, Social Anarchism or Lifestyle Anarchism, The Spanish Anarchists, The Ecology of Freedom, Urbanization Without Cities, and Re-enchanting Humanity. He lives in Burlington, Vermont.

Ramachandra Guha is an Indian historian and economist whose research interests include environmental, social, economics, political, contemporary and cricket history. He is also a columnist for The Telegraph, Hindustan Times and Hindi Daily Newspaper Amar Ujala. Guha's books and essays have been translated into more than twenty languages. The prizes they have won include the UK Cricket Society's Literary Award and the Leopold-Hidy Prize of the American Society of Environmental History. In 2008, Prospect and Foreign Policy magazines nominated Guha as one of the world's one hundred most influential intellectuals. In 2009, he was awarded the Padma Bhushan for services to literature and education. In 2015, he was awarded the Fukuoka Prize for contributions to Asian culture and scholarship.