In 1979, Robert Lucas and Thomas Sargent published a brief manifesto entitled "After Keynesian Macroeconomics." In the article, they mock the General Theory's` mere "'talk' about economic activity," and look forward to a scientific economics built around mathematical models that are clear, logically consistent, and testable by means of econometric techniques.
LUCAS: Yes, precisely.
KEYNES: It can also be found in ancient myth.
SARGENT: Whatever do you mean?
KEYNES: Do you know the legendary story of Septuagint?
SARGENT: Never heard of it.
KEYNES: Let me tell you the story then.
SARGENT: Yes, please.
KEYNES: Very good. King Ptolemy gathered seventy scholars together and gave each one an ancient Hebrew text. He placed them in separate rooms and told them, one-at-a-time, to translate the Hebrew text into Greek. And, lo and behold, they emerged with seventy identical translations.
LUCAS: I don’t get it.