https://en.m.wikipedia.org/wiki/Strauss%E2%80%93Howe_generational_theory https://en.m.wikipedia.org/wiki/Strauss%E2%80%93Howe_generat... Definitely controversi

https://en.m.wikipedia.org/wiki/Strauss%E2%80%93Howe_generational_theory https://en.m.wikipedia.org/wiki/Strauss%E2%80%93Howe_generat... Definitely controversial academically, but the idea of a generational cycle has been considered.