According to The Affluent Society [0], a seminal book that established the idea of "conventional wisdom", most movements start with diffuse sentiment changes an

According to The Affluent Society [0], a seminal book that established the idea of "conventional wisdom", most movements start with diffuse sentiment changes and then crystallize into a "changing of the guard" only after time has allowed a group to recognize that the general attitude has shifted. [0]: https://en.wikipedia.org/wiki/The_Affluent_Society https://en.wikipedia.org/wiki/The_Affluent_Society