In case you haven't noticed, Piketty's 'Capital in the Twenty-First Century' is a publishing sensation. It has already sold 200,000 copies, making it the '50 Shades of Grey' of economics books. It is being reviewed on the internet by supporters and critics who self-evidently have not read all of its 577 pages. And it has jolted the right, who are scrabbling around for an answer to its main message: rising inequality is killing capitalism.
