Rt Hon Rory Stewart MP delivers a talk as part of the 750th anniversary celebrations of Balliol College, University of Oxford. Speaking at the Sheldonian Theatre in Oxford, he addresses the topic of how the world might change over the next 75 years by explaining how the ancient kingdom of Northumbria morphed itself from a poverty stricken remnant of the Roman Empire into a golden age of culture in just two generations. He asks the audience not to second guess who will be dominant in the 21st century, but instead argues that countries should concentrate on building their own capacities. He also uses his experience in Afghanistan to argue that real events can very rapidly overtake theoretical predictions. He is introduced by Sir Drummond Bone, Master of Balliol College, University of Oxford.