Editing Haidt 2012 (section)

=== Exhibit C: Genes and Cultures Coevolve ===
*Only around 600,000-700,000 years ago where hominids began to cross over into shared intentionality
**Most likely Homo heidelbergensis that made this cross
*Richerson and Boyd argue that cultural innovations evolve similarly to biological ones; you can’t study one without studying the other
**Thus, cultural innovations around morality might have led to genetic responses, ultimately leading to ultrasociality
*“Tribal instincts hypothesis”: human groups have always been competing with neighboring groups
**Groups with cultural innovations that allowed them to cohere better usually won
*Example: body modifications like tattoos and piercings might have started off as a way to establish a sense of community by creating a physical resemblance/commonality
*“Self-domestication”: groups selected those who conformed to social and group norms best
**Selected friends and partners based on “ability to live within the tribe’s moral matrix”
**Created friendlier, gentler humans and conditions for peaceful coexistence