They were turning points in world history: it has been 100 years since the outbreak of the First World War, 75 years since World War Two erupted, and it was 25 years ago that the Berlin Wall was breached. How are these defining moments in history connected and what are their impact on the modern day? Did the outbreak of war in 1914 represent a great failure on the part of Europe’s decision makers? Or was it an unavoidable conflict that inexorably led to the outbreak of the Second World War? Decades after the Nazis were defeated, how were Germans able to pull down the Berlin wall and bring about the reunification of Germany?