The greatest cruelties of our century have been the impersonal cruelties of remote decision, of system and routine, especially when they could be jus… - Eric Hobsbawm

Look at London. Of course it matters to all of us that London's economy flourishes. But the test of the enormous wealth generated in patches of the capital is not that it contributed 20%-30% to Britain's GDP but how it affects the lives of the millions who live and work there. What kind of lives are available to them? Can they afford to live there? If they can't, it is not compensation that London is also a paradise for the ultra-rich. Can they get decently paid jobs or jobs at all? If they can't, don't brag about all those Michelin-starred restaurants and their self-dramatising chefs. Or schooling for children? Inadequate schools are not offset by the fact that London universities could field a football team of Nobel prize winners.

When we write the ‘world history’ of earlier periods, we are in fact making an addition of the histories of the various parts of the globe, but which, in so far as they had knowledge of one another, had only marginal and superficial contacts, unless the inhabitants of some region had conquered or colonized another, as the west Europeans did the Americas.

There are cases - perhaps mine is among them - where this discovery can be particularly helpful. Much of my life, probably most of my conscious life, was devoted to a hope which has been plainly disappointed, and to a cause which has plainly failed: the communism initiated by the October Revolution. But there is nothing which can sharpen the historian's mind like defeat.