Coined by Leon Fesinger:
https://en.wikipedia.org/wiki/Leon_Festinger
who was a student of Kurt Lewin:
https://en.wikipedia.org/wiki/Kurt_Lewin
Leon entered social physcology in 1945 while working with Lewin at MIT. Perhaps they met at the house.
Cognitive Dissonance
The NY Times discussed cognitive dissonance in relation to the politics of October 2020: