Somewhat similarly to an “evolutionary tree” with shared ancestors, abused people were often abused themselves. “Breaking the chain” of trauma could also be considered a “mutation”, in that its another form of nature “rolling the dice” to see what pans out. Conversely, people with happy lives often create happy children, perpetuating the behavior.
None of that matters when most of Humanitys’ “Growth” “Medium” is toxic.
Literally a Toxic Culture.
Not conducive for the mental development/physical growth for happy/healthy organisms.
I see your point, though I wouldn’t necessarily view society, or a “toxic culture”, as the medium, but rather a group of individuals who share similar generational trauma/nurturing. Another way to look at it would be that a Global/National/Regional/Familial "culture is the equivalent to Class/Order/Family/Genus in my example.
What I find interesting about generational trauma/nurturing, is that it usually evolves independent of our blood relations. Friends, teachers, community leaders, etc., each have their own level of influence on both individuals, and the broader culture, which often produces downstream effects for later generations.