Samuel Langhorne Clemens (November 30, 1835 – April 21, 1910), known by his pen name Mark Twain, was an American writer, humorist, entrepreneur, publisher, and lecturer.
The Strauss–Howe generational theory, devised by William Strauss and Neil Howe, describes a theorized recurring generation cycle in American history and Western history. According to the theory, historical events are associated with recurring generational personas (archetypes). Each generational persona unleashes a new era (called a turning) lasting around 20–25 years, in which a new social, political, and economic climate (mood) exists.
An average life is 80 years and consists of four periods of ~20–22 years
Childhood → Young adult → Midlife → Elderhood
A generation is an aggregate of people born every ~20–22 years
Baby Boomers → Gen X → Millennials → Homelanders
Each generation experiences "four turnings" every ~80–90 years
High → Awakening → Unraveling → Crisis
A generation is considered "dominant" or "recessive" according to the turning experienced as young adults. But as a youth generation comes of age and defines its collective persona an opposing generational archetype is in its midlife peak of power.
Dominant: independent behavior + attitudes in defining an era
Recessive: dependent role in defining an era
https://en.wikipedia.org/wiki/Strauss%E2%80%93Howe_generational_theory
