The Spirit Level: Why More Equal Societies Almost Always Do Better is a book by Richard G. Wilkinson and Kate Pickett, published in 2009 by Allen Lane. The book is published in the US by Bloomsbury Press with the new sub-title: Why Greater Equality Makes Societies Stronger. It was then published in a paperback second edition in November 2010 by Penguin Books with the subtitle, Why Equality is Better for Everyone.
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