Are you thinking of Kuhn's paradigm shifts?[1] Or the closely-related concept of punctuated equilibria?[2][3] [1] https://en.wikipedia.org/wiki/Paradigm_shift

Are you thinking of Kuhn's paradigm shifts?[1] Or the closely-related concept of punctuated equilibria?[2][3] [1] https://en.wikipedia.org/wiki/Paradigm_shift https://en.wikipedia.org/wiki/Paradigm_shift [2] https://en.wikipedia.org/wiki/Punctuated_equilibrium https://en.wikipedia.org/wiki/Punctuated_equilibrium [3] https://www.youtube.com/watch?v=mcAq9bmCeR0 https://www.youtube.com/watch?v=mcAq9bmCeR0