https://en.wikipedia.org/wiki/Strauss–Howe_generational_theory
In Generations, they refer to these four archetypes as Idealist, Reactive, Civic, and Adaptive. In The Fourth Turning (1997) they change this terminology to Prophet, Nomad, Hero, and Artist . [55] They say the generations in each archetype not only share a similar age-location in history, they also share some basic attitudes towards family, risk, culture and values, and civic engagement.