This is very very crude. It's something off the top of my head scribbled on a scrap of paper as an outline for a first draft. But I will never go beyond that outline, because I wouldn't be any good at doing it.
The history of the Old Keynesian model is very quick. You have Keynes' 1936 General Theory, and Hicks' 1937 ISLM model. Done. All else is commentary.
The history of the New Keynesian model is very slow. It took about three decades. We need to divide it into stages.
(Or is my perspective biased by the fact that I wasn't alive in the 1930's and 1940's, and only started paying attention to economics in the 1970's?)