This is one of my favorite theories, explains everything about modern societies.

"Epigenetics between the generations, we inherit more than just genes":

https://medicalxpress.com/news/2017-07-epigenetics-inherit-genes.html

"We are more than the sum of our genes. Epigenetic mechanisms modulated by environmental cues such as diet, disease or lifestyle take a major role in regulating the DNA by switching genes on and off. It has been long debated if epigenetic modifications accumulated throughout the entire life can cross the border of generations and be inherited to children or even grand children. Now researchers from the Max Planck Institute of Immunobiology and Epigenetics in Freiburg show robust evidence that not only the inherited DNA itself but also the inherited epigenetic instructions contribute in regulating gene expression in the offspring. Moreover, the new insights by the Lab of Nicola Iovino describe for the first time biological consequences of this inherited information. The study proves that mother's epigenetic memory is essential for the development and survival of the new generation. Humans have more than 250 different cell types. They all contain the exact same DNA bases in exactly the same order; however, liver or nerve cells look very different and have different skills. What makes the difference is a process called epigenetics. Epigenetic modifications label specific regions of the DNA to attract or keep away proteins that activate genes. Thus, these modifications create, step by step, the typical patterns of active and inactive DNA sequences for each cell type. Moreover, contrary to the fixed sequence of 'letters' in DNA, epigenetic marks can also change throughout life and in responses to environment or lifestyle. (...)"

"An introduction to Biohistory":

Part 1, "The Basis of Civilization" - https://www.youtube.com/watch?v=b4-Od8cq5Gk

Part 2, "Democracy, Money & Violence" - https://www.youtube.com/watch?v=CFku9NgUIkI

Part 3, "The Civilization Cycle" - https://www.youtube.com/watch?v=k8rsb7qILgE

Part 4, "Population Cycles & Behavior" - https://www.youtube.com/watch?v=OC3zpb3WKAA

"MGTOW - end of civilisation":

https://www.youtube.com/watch?v=f4GQV2HkGmY

"Mouse Utopia Experiment", "The Rise of the Beautiful Ones":

https://www.youtube.com/watch?v=0Z760XNy4VM

https://www.youtube.com/watch?v=doOXWSXbRCc

"The Fall of the Roman Empire Can Be Explained By Biology":

http://www.historyoftheancientworld.com/2015/05/fall-of-roman-empire-can-be-explained-by-biology-researcher-says/

Wikipedia articles:

https://en.wikipedia.org/wiki/Transgenerational_epigenetic_inheritance

https://en.wikipedia.org/wiki/Biocultural_anthropology

https://en.wikipedia.org/wiki/Biohistory

https://en.wikipedia.org/wiki/Dual_inheritance_theory

https://en.wikipedia.org/wiki/Epigenetics

Have you heard of this before or am I the first who posts about it here?