Over the past few years there have been a number of books examining how we might change society.
Malcolm Gladwell's Tipping Point
Richard Thaler & Cass Sunstein's Nudge (which Cameron thinks is A1)
Charles Leadbetter's We-Think
Matthew Bishop & Michael Green's Philanthro-Capitalism
But the subject that needs to be re-visited is Trust. This was the name of book by Anthony Seldon, it was rushed out in 2009 at the time of the MPs Expenses crisis and ran out of ideas.
Increasingly though, as we look at Bankers, Politicians and Journalists, it is Trust which needs to be addressed.