History has many lessons for how to develop a successful civilisation. The trick is to understand the patterns that lead to optimism and innovation. So, where do we rate in the 21st century? Also, why all history is revisionist and why a healthy sense of revisionism drives a deeper understanding of the past, present and future.GuestsJohan Norberg — author and historian. Senior Fellow, Cato institute in Washington DCAssociate Professor Sarah Percy — Political Science and International Studies, University of QueenslandDr James Banner — Historian and co-founder of the National Humanities Alliance

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