David Christian's approach to understanding history can help all of us learn to prepare for the future that lies ahead and the big challenges facing humanity. Bill Gates
David Christian is a Professor Emeritus at Macquarie University, where he was formerly a Distinguished Professor of History and the director of the Big History Institute. He has delivered keynotes at conferences around the world, including the Davos World Economic Forum, and his TED Talk has been viewed more than 19 million times. He is the author of numerous books including the New York Times bestseller Origin Story.