(I've only started the book.) Its claim is: under reasonable assumptions, inequality increases over time under capitalism. Yes, Marx argued this; Piketty has a

(I've only started the book.) Its claim is: under reasonable assumptions, inequality increases over time under capitalism. Yes, Marx argued this; Piketty has an elegant new analysis supported by a lot of newly collected data. The book is in part a rebuttal to Simon Kuznets and others, who argue (plausibly) that capitalism tends to decrease inequality in the long run.