Paul L. Harris is the Victor S. Thomas Professor of Education at Harvard University. He is a graduate of Sussex and Oxford Universities and has previously taught at the University of Lancaster, the Free University of Amsterdam, the London School of Economics, and Oxford University. He is a Fellow of the British Academy and of the Norwegian Academy of Science and Letters. A developmental psychologist with interests in the development of cognition, emotion and imagination, Harris is currently studying how young children learn about history, science and religion on the basis of what trusted informants tell them, rather than from firsthand observation. He is the author of The Work of the Imagination (2000).

Michael Schleifer is a Professor in the Faculty of Education at the University of Quebec in Montreal. He is a graduate of Oxford University (Philosophy) and McGill University (Psychology). His past appointments include being Professor of Ethics at McGill University and Clinical Psychologist at the Montreal Children's Hospital Department of Psychiatry. He has published more than a hundred articles in philosophical, psychological and educational journals and has edited works on identity, cooperation, the development of judgment, morality and emotion. His latest books are Talking about Feelings and Values with Children (2006) and How to Have a Dialogue of Mutual Respect with your Teenager (2007).