History is divided on whether adding sex discrimination to the list of no-nos in the 1964 Civil Rights Act was meant to be a joke or a death knell for the bill. Either way, with women still making 77 cents on the dollar compared to men and the courts now firmly on the side of corporations, the joke is on women now.
Right now Thomas Piketty's book, and all the others that have exposed, analyzed and offered prescriptions for our economic inequality, are powerful ideas in search of a movement. Income equality is not like the weather. Rather than just complaining about it, we can actually do something to make it better.