John Piper is founder and teacher of Desiring God and chancellor of Bethlehem College and Seminary. For 33 years, he served as pastor of Bethlehem Baptist Church, Minneapolis, Minnesota. He is author of more than 50 books, including Desiring God: Meditations of a Christian Hedonist and most recently Foundations for Lifelong Learning: Education in Serious Joy.

Doug Birdsall is the honorary chairman of the Lausanne Movement.

Lindsay Brown is International Director of The Lausanne Movement.

Christopher Wright (Ph.D., Cambridge) is the international director of Langham Partnership, an ordained Anglican who serves on the staff of All Souls Church in London, and an author.