We know that behaviorally modern humans (i.e., we) appeared in Africa 50 thousand years ago and spread throughout the world. But, we did not live long enough for grandparents to be part of the picture until about 30 thousand years ago.
The unique multi-generational social environment spawned by the presence of grandparents is thought to have created remarkable opportunities for human beings, allowing cultural knowledge to survive longer in the brains of individuals to be spread to more new humans.
This event in human evolutionary history has been used to explain why women survive beyond menopause, beyond when they can pass their genes on to new offspring, the very compelling Grandmother Hypothesis. Of course, although men do not experience a similar loss of fertility, grandfathers can be put to many of the same extended parenthood purposes after they are no longer fit for their classic evolutionary roles as hunters and warriors.
This development brought great benefits, but it also must have posed problems, complicating the simple, dichotomous relationship between children and parents that had existed (as far as my limited knowledge extends) among all creatures throughout the history of life.
I believe this generational tension is the source of a common four-character scheme in story-telling I’ve been exploring in my Writing Archetypes series. It started with ancient myth and continues onto the modern page and screen.
It’s a cultural solution to a unique evolutionary situation, the multi-generational community. Each archetype can be seen to represent a different generation: the Companion, the Hero, the Rough, and the Guru. You might say, “But, John! That’s four generations and grandparents only result in three generations.”
Therein lies the tricky part.