Five years ago Tim Marshall wrote the international best selling book Prisoners of Geography which examined how our politics, demographics, our economies and societies are determined by geography. Tim was diplomatic editor at Sky News and has also worked for the BBC and LBC/IRN radio. He has reported from 40 countries and covered conflicts in Croatia, Bosnia, Macedonia, Kosovo, Afghanistan, Iraq, Lebanon, Syria and Israel. He used his expertise and understanding in international affairs to look at the deep history of this planet both in Prisoners of Geography and in his latest book The Power of Geography where he explores further how our world is shaped by its geography.