Keith Tudor is Professor of Psychotherapy at Auckland University of Technology, Aotearoa New Zealand, where he is also currently a co-Lead of Moana Nui Research in the Psychological Therapies. He is the author and/or editor of over 100 publications on various aspects of person-centred psychology, including (with the late Bernie Neville) Eco-centred Therapy: Revisioning Person-centred Psychology for a Living World (Routledge, 2023).

Maureen O'Hara is Director of the International Futures Forum US, Professor Emerita of Psychology at National University, San Diego, CA, and President Emerita of Saybrook Graduate School, San Francisco, CA. Working closely with American psychologist Dr Carl R. Rogers for two decades, she helped develop the person-centred approach to psychotherapy and large group process.