RCT's were developed by psychologists (for educational purposes) and promoted by medical statisticians.
Causal inference was essentially invented by a computer scientist.
You can definitely thank geographers for GIS, and ML is basically a rebranding of statistics by Comp Sci researchers.
Game theory I'll definitely concede to economics, but political science is it's own discipline, and shouldn't be regarded as part of economics.
https://en.m.wikipedia.org/wiki/Rubin_causal_model
Pearl credits it in The Book of Why.
At a minimum in 100 years I expect current macroeconomic theory to get as much respect as phrenology does. One of the basic failures is you can’t abstract away the underlying mechanics of societies. Changing the federal funds rate doesn’t help if your in the Zombie apocalypse movie. Granted in the real world you might be dealing with drought, soldiers, or empty oil wells rather than Zombies, but the same basic mismatch still applies.
Plato would be surprised to learn that.
A safer bet would be that people in 50 or 100 years times will be expecting people in 100 years time to regard it as astrology.
Edit: good catch(es), mobile commenting and I missed a key phrase (source of many methodologies).