Iain was born in Aberdeen and was formerly the Dean of Arts and Divinity at the University of Aberdeen. He then became Moderator for the Church of Scotland and went on to travel across the world becoming President of Princeton Theological Seminary in the United States of America. He later returned to Aberdeen as Pro-Chancellor of the University of Aberdeen (for HRH The Duchess of Rothesay), Dean of the Chapel Royal in Scotland for The Queen and Dean of the Order of the Thistle. He is a Christian theologian who is very committed to inter-faith understanding. He is a Fellow of the Royal Society of Edinburgh.