Thomas Piketty's blockbuster 2014 book, Capital in the 21st Century, may prove to be a game-changer, one of those rare books such as Friedan's The Feminine Mystique, which helped spark a new feminist movement. The worldwide flood of commentary suggests Piketty's book has already opened a new conversation not only about inequality, but about class, capitalism, and social justice. Inherited wealth is at the heart of Piketty's book, and Derber shows...