Paul Krugman writes:

Is it too much to ask that someone criticizing Keynes actually, you know, read Keynes …?

It is, of course, a perfectly reasonable request. But it’s pretty funny for the request to come from the same person who declared:

Until John Maynard Keynes published The General Theory of Employment, Interest, and Money in 1936, economics—at least in the English-speaking world—was completely dominated by free-market orthodoxy. Heresies would occasionally pop up, but they were always suppressed.

Krugman’s declaration here shows that has not actually, you know, read the pre-1936 economics literature to which he refers. (He has, instead, read and repeated Keynes’ mis-characterization of it.) Never mind that the anti-free-market Institutionalists were not "completely dominated" or "suppressed". The two leading neoclassical economists of the English-speaking world c. 1910, Alfred Marshall and Irving Fisher, both explicitly rejected the doctrine of laissez faire.