Quietly spoken, late middle-aged and quintessentially English, Richard Wilkinson is the last person you would expect to come up with a sweeping theory of everything. Yet that's precisely what this retired professor from Nottingham medical school, in collaboration with his partner, Kate Pickett, a lecturer at the University of York, has done.
The opening sentence of their new book, The Spirit Level, cautions, "People usually exaggerate the importance of their own work and we worry about claiming too much" - yet by the time you reach the end you wonder how they could have claimed any more. After all, they argue that almost every social problem common in developed societies - reduced life expectancy, child mortality, drugs, crime, homicide rates, mental illness and obesity - has a single root cause: inequality.
And, they say, it's not just the deprived underclass that loses out in an unequal society: everyone does, even the better off. Because it's not absolute levels of poverty that create the social problems, but the differentials in income between rich and poor. Just as someone from the lowest-earning 20% of a more equal society is more likely to live longer than their counterpart from a less equal society, so too someone from the highest-earning 20% has a longer life expectancy than their alter ego in a less equal society.
Take these random headline statistics. The US is wealthier and spends more on health care than any other country, yet a baby born in Greece, where average income levels are about half that of the US, has a lower risk of infant mortality and longer life expectancy than an American baby. Obesity is twice as common in the UK as the more equal societies of Sweden and Norway, and six times more common in the US than in Japan. Teenage birth rates are six times higher in the UK than in more equal societies; mental illness is three times as common in the US as in Japan; murder rates are three times higher in more unequal countries. The examples are almost endless.
http://www.guardian.co.uk/society/2009/mar/12/equality-british-society