Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Spirit Level: Why More Equal Societies Almost Always Do Better is a book by Richard G. Wilkinson and Kate Pickett, published in 2009. This book is also published in the US by Bloomsbury Press (December, 2009) with new sub-title: why greater equality makes societies stronger. It was then published in a paperback second edition in the UK in February 2010 with the different sub-title, "Why Equality is Better for Everyone", which included an Appendix of some of the statistical data which had previously only been available on the Equality Trust website. The book claims that there are pernicious effects that inequality has on societies: eroding trust, increasing anxiety and illness, (and) encouraging excessive consumption. It claims that for each of eleven different health and social problems: physical health, mental health, drug abuse, education, imprisonment, obesity, social mobility, trust and community life, violence, teenage pregnancies, and child well-being, outcomes are substantially worse in more unequal rich countries.