"Lots of bright people posit theories which turn out to be incorrect. I don't know that he was a great economist, but he was no dummy."
But his ideas were (a) wrong, and (b) used by politicians who twisted his ideas into excuses for very bad Government policies. It was right to place it on the list, probably the most important economics text in the early 20th century.
Yes, Keynes was very smart. Probably the smartest author on the list. Too bad he didnt write a better theory then!
It surely belongs on this list. I never said it didn't.