prisoners of geography tim marshall pbTHE INTERNATIONAL AND SUNDAY TIMES BESTSELLER All leaders are constrained by geography. Their choices are limited by mountains, rivers, seas and concrete. Yes, to understand world events you need to understand people, ideas and movements but if you don't know geography, you'll never have the full picture.; To understand Putin's actions, for example, it is essential to consider that, to be a world power, Russia must have a navy. And if its ports freeze