Tej Vir Singh was the Founding Director of the Centre for Tourism Research and Development, Lucknow, India. He launched several journals and was the founding Editor-in-Chief of Tourism Recreation Research. He edited and co-edited 16 books and supervised 15 doctoral candidates who were awarded PhDs in Tourism.

Richard Butler is Emeritus Professor of Tourism, School of Business, University of Strathclyde, Glasgow, UK. He has published 25 books, nearly 100 journal articles and book chapters and was awarded the UNWTO Ulysses medal in 2016 for 'excellence in the creation and dissemination of knowledge'.

David A. Fennell is a Professor in the Department of Geography and Tourism Studies, Brock University, Canada. He is the founding Editor-in-Chief of the Journal of Ecotourism and has published many articles and books, including Sustainable Tourism: Principles, Contexts and Practices.