Britain is a society increasingly divided between the super-affluent and the impoverished. A Sharing Economy proposes radical new ways to close the growing income gap and spread social opportunities. Drawing on overseas examples, Stewart Lansley argues that mobilising the huge financial potential of Britain's public assets could pay for a pioneering new social wealth fund. Such a fund would boost economic and social investment, and, by building the social asset base, simultaneously strengthen the public finances. A powerful new policy tool, such funds would ensure that more of the gains from economic activity are shared by all and not colonised by a powerful few. This is a vital new contribution to the pressing debate on how to reduce inequality and combat austerity.