Growing economic inequality is bad for us all – it undermines growth and social cohesion. Yet the consequences for the world’s poorest people are particularly severe. Apologists for the status quo claim that concern about inequality is driven by ‘politics of envy’. They often cite the reduction in the number of people living in extreme poverty as proof that inequality is not a major problem. But this is to miss the point. As an organization that exists to tackle poverty, Oxfam is unequivocal in welcoming the fantastic progress that has helped to halve the number of people living below the extreme poverty line between 1990 and 2010. Yet had inequality within countries not grown during that period, an extra 200 million people would have escaped poverty. That could have risen to 700 million had poor people benefited more than the rich from economic growth.