This is an important book given it's timing in UK politics and in world affairs. Read it, I do not want to repeat what it says better than I can. It pulls together a convincing case for moving to politics that reduce inequality and certainly counters the spurious "trickle down" theories put by some. It should be read with Adair Turner's Just Capital
which looks at similar statistics over a similar period though was published some 8 years ago. That looks at the relationship between various measures of a successful society when you step beyond the crude GDP per head measure and looks at the proportion of wealth controlled by central government compared with the private sector, in other words overall taxation levels. It came to very similar conclusions on which were the most successful societies though ranking the Netherlands at number 1.
The "weakness" of this book is it recommendations for actions as I cannot see yet which political party would take them up in the UK and have the credibility to be elected on that platform. Please read it and then challenge your MP, the party you are aligned with our anyone else to address the issues clearly set out here. In needs to be an activists book.