After the Second World War it seemed that, in the West, society was gradually becoming more equal. Welfare States had been established in many countries, there was a general reduction in income inequality and in America Franklin D. Roosevelt’s New Deal seemed to ensure strong democratic values and broadly shared prosperity. So what went wrong? Why, in the past thirty years, has the gap between the poor and the super-rich become such a gulf? Why are we so disillusioned with the political system? And what can be done about this huge economic inequality and bitter polarization?