As to "ancestral indigenous" groups I'm sceptical about the lack of a dominance hierarchy.
I clipped this out of a much longer piece :
"But what about egalitarianism? In a 2004 study, Michael Gurven marshals an impressive amount of cross-cultural data and notes that hunters tend to keep more of their kill for themselves and their families than they share with others.12 While there is undeniably a great deal of sharing across hunter-gatherer societies, common notions of generalized equality are greatly overstated. Even in circumstances where hunters give away more of their meat than they end up receiving from others in return, good hunters tend to be accorded high status, and rewarded with more opportunities to reproduce everywhere the relationship has been studied.13 When taking into account ‘embodied wealth’ such as hunting returns and reproductive success, and ‘relational wealth’ such as the number of exchange and sharing partners, Alden Smith et al. calculated that hunter-gatherer societies have a ‘moderate’ level of inequality, roughly comparable to that of Denmark.14 While this is less inequality than most agricultural societies and nation states, it’s not quite the level of egalitarianism many have come to expect from hunter-gatherers.
In the realm of reproductive success, hunter-gatherers are even more unequal than modern industrialized populations, exhibiting what is called “greater reproductive skew,” with males having significantly larger variance in reproductive success than females.15 Among the Ache of Paraguay, males have over 4 times the variance in reproductive success that females do, which is one of the highest ratios recorded. This means some males end up having lots of children with different women, while a significant number of males end up having none at all. This is reflected in the fact that polygynous marriage is practiced in the majority of hunter-gatherer societies for which there are data. Across these societies, the average age at marriage for females is only 13.8, while the average age at marriage for males is 20.7.16 Rather than defending what would be considered child marriage in contemporary Western societies, anthropologists often omit mentioning this information entirely.
According to anthropologists Douglas Fry and Geneviève Souillac, “Nomadic forager data suggest a human predilection toward equality, including gender equality, in ethos and action,”17 yet the available data do not support this notion in the slightest. On the contrary, in 1978 Robert Tonkinson had found that, among the Mardu hunter-gatherers of Australia, “Mardu men accord themselves greater ritual responsibility, higher status, more power, and more rights than women. It is a society in which male interests generally prevail when rights are contested and in the centrally important arena of religious life.”18 Among the Hiwi of Venezuela, and the Ache of Paraguay, female infants and children are disproportionately victims of infanticide, neglect, and child homicide.19 20 It is in fact quite common in hunter-gatherer societies that are at war, or heavily reliant on male hunting for subsistence, for female infants to be habitually neglected or killed.21 22 In 1931, Knud Rasmussen recorded that, among the Netsilik Inuit, who were almost wholly reliant on male hunting and fishing, out of 96 births from parents he interviewed, 38 girls were killed (nearly 40 percent).23
It is also instructive to compare the homicide rates of hunter-gatherer societies with those of contemporary nation states. In a 2013 paper entitled “From the Peaceful to the Warlike,” anthropologist Robert Kelly provides homicide data for 15 hunter-gatherer societies.24
From 1920-1955 the !Kung had a homicide rate of 42/100,000 (about 8 times that of the US rate in 2016), however Kelly mentions that, “murders ceased after 1955 due to the presence of an outside police force.” "