A new book - The Rise and Fall of Nations - gives a global view of economic health and wealth as it stands today - using such guides as how many billionaires do you have and the role of depopulation amongst countries. It's author is Ruchir Sharma - Head of Emerging Markets and Chief Global Strategist at Morgan Stanley Investment Management - and he joined Steve Clarke to discuss the book, his experience of markets (particularly emerging markets) post-2008 & his view on Brexit.