Among the Yanomami (per Napoleon Chagnon), killing outsiders was not “murder,” it raised status. Men who killed had more wives. Violence was cyclical and regulated, not collapse. Humans are not universally anti-killing, mainly in-group.
That pressure kept population density low and groups mobile. Less surplus, less accumulation, weaker incentives for technological scaling. Over ~10,000+ years this maintained a relatively stable human–environment equilibrium.
That pressure kept population density low and groups mobile. Less surplus, less accumulation, weaker incentives for technological scaling. Over ~10,000+ years this maintained a relatively stable human–environment equilibrium.