As highlighted by the post-crisis protests against the '1 per cent', income inequality has become an era-defining issue.
Even the World Economic Forum (WEF), a traditional bastion of the rich and powerful, had its two cents to say on the matter in its 2013 'Global Risks Report'.
"The global risk that respondents rated most likely to manifest over the next 10 years is severe income disparity," the WEF study says.
But in a fascinating report published last November, World Bank economist Branko Milanovic shows by one measure the years "between 1988 and 2008 witnessed the first decline in global income inequality since the Industrial Revolution".
"Broadly speaking, the bottom third, with the exception of the very poorest, became significantly better-off, and many of the people there escaped absolute poverty," the study says.