The first, of course, is the one that preoccupies most writers and commentators on the question. The dominant metaphor seems to be a sort of global seesaw, with a few hugely rich individuals weighing down one end and the rest of us clinging for dear life to the other. As Thomas Piketty's Capital in the 21st Century (2014) demonstrates, the rich have been getting richer much faster than the rest of us, so the seesaw is getting ever more skewed. And so inequality is big news right now. Two things, in particular, are remarkable about the current debate. The first is how many people are having it – not just the usual suspects, but lesser-known lefty agitators including the Pope, President Barack Obama, the managing director of the International Monetary Fund (IMF) and the head of the Bank of England. One would think that a robust response was inevitable.