I am actually reading "Macroeconomics and the Phillips Curve" by James Forder.
I started in the middle after searching for [Samuelson incomes policy]. I shall go to amazon.com and honestly pay, although I am currently reading a google book. I decided to read the whole thing and learned something on the first page. It seems that, like the quantity theory of money, the Phillips curve was first discussed by David Hume.
So the great macroeconomic debate of the 60s was Hume vs Hume.
It is impressive that his disciple Adam Smith had interesting things to add. Pity so few of their successors did.