Deirdre McCloskey wrote a truly massive review, and in some senses a rebuttal, of Thomas Piketty's Capital in the Twenty-First Century
I am not really going to comment on the details of her paper -- many prominent economists have already done so. I will say that I learned a lot from it not just about Piketty's proposition but about economic history in general. It is an interesting read.
No, what I wanted to comment on -- in this era when rebuttals usually take the form of impugning the other person's funding, integrity, honesty, and motivations rather than their actual arguments -- is that she begins her article with this:
It has been a long time (how does “never” work for you?) since a technical treatise on economics has had such a market. An economist can only applaud. And an economic historian can only wax ecstatic. Piketty’s great splash will undoubtedly bring many young economically interested scholars to devote their lives to the study of the past.....
It is an honest and massively researched book. Nothing I shall say—and I shall say some hard things, because they are true and important—is meant to impugn Piketty’s integrity or his scientific effort. The book is the fruit of a big collaborative effort of the Paris School of Economics, which he founded, associated with some of the brightest lights in the techno-left of French economics. Hélas, I will show that Piketty is gravely mistaken in his science and in his social ethics. But so are many economists and calculators, some of them my dearest friends.