Many people will have stood in awe of some great monument in a remote part of the world and wondered how and why it was built. Jared Diamond poses the equally interesting question, why was it abandoned, what happened to the society that created it, the Ozymandias question. His conclusion is that societies build because they are powerful enough to deploy the resources and seek to control, what they regard, elements that give them such wealth. Equally they fail because they ignore the changes, mostly climatic, that are occurring around them. As with all of Jared Diamond’s books the range of evidence is vast, the case studies are drawn from many parts of the world throughout history. The book is an ominous warning for the world today.