Tim Marshall, Prisoners of Geography, 2016

“Broadly speaking, geopolitics looks at the ways in which international affairs can be understood through geographical factors; not just the physical landscape – the natural barriers of mountains or connections of river networks, for example – but also climate, demographics, cultural regions and access to natural resources. Factors such as these can have an important impact on many different aspects of our civilisation, from political and military strategy to human social development, including language, trade and religion”