I have just posted an article on “Mill’s Defence of Say’s Law and Refutation of Keynes” as part of the Liberty Fund discussion on “Reassessing the Political Economy of John Stuart Mill”. If you are interested in knowing how far economic theory has gone wrong since the Keynesian Revolution, you ought to have a look at this thread which includes not just me, but also Richard Ebeling, Nicholas Capaldi and Sandra Peart. However, my latest post is due to the editor at the Liberty Fund picking up an offhand comment of mine and asking me to expand. Why this did not occur to me on my own, I cannot say, but this is the first time in which I have written a condensed version of what is wrong with Keynesian macro using Mill’s Principles as the basis for understanding pre-Keynesian theory. This is the final para but I do encourage you to read it all.

Reading the three sections of the Principles together we find Mill arguing:

• recessions do occur and when they do the effect on the labor market is prolonged and devastating;
• recessions are not caused by oversaving and demand deficiency;
• recessions cannot be brought to an end by trying to increase aggregate demand.

That is as complete a rejection of Keynesian economics as one is likely to find, and it was stated in 1848. These propositions and their supporting arguments were with near unanimity accepted by the entire mainstream of the economics profession through until the publication of The General Theory in 1936. Since then they have almost entirely disappeared resulting in a loss in our ability to understand the nature of recessions or what needs to be done to bring recessions to a timely end.

Mill is not hard to understand unless you have learned Keynesian macro first. And then it is very difficult indeed. But if your interest is in understanding things such as why the stimulus was such a catastrophe, I cannot think where better to go to find out than from Mill. And if you are interested in Mill, then you should read this Liberty Fund discussion first.