The late Sumner B. Twiss was Distinguished Professor Emeritus of Human Rights, Ethics, and Religion at Florida State University, USA, and author of many books.

Ping-cheung Lo is Dean and Rebecca Stephan Professor of Chinese Studies at Fuller Theological Seminary, USA, and author or editor of over a dozen books, in both Chinese and English.

Benedict S. B. Chan is Director of Centre for Applied Ethics and Associate Professor, Department of Religion and Philosophy, at Hong Kong Baptist University.