Professor Tim Evans of Middlesex University asks if the IMF is fit for purpose in a world where power and wealth are moving east and where there are now competitors such as China? With Africa due to be home to 40% of humanity by the end of the century, he discusses the remarkable Megalopolis of coastal west Africa, one of the continent's great success stories. And as California is set to overtake Germany in the list of the world's largest economies, he considers why we can't emulate it in the UK.
