Richard Overy sets out in Blood and Ruins to recast the way in which we view the Second World War and its origins and aftermath. He argues that this was the 'great imperial war', a violent end to almost a century of global imperial expansion which reached its peak in the ambitions of Italy, Germany and Japan in the 1930s and early 1940s, before descending into the largest and costliest war in human history and the end, after 1945, of all territorial empires.