I suppose their is an innate primate impulse to do this, but many anthropologists and related scientific experts see intentional on-going suppression of this impulse as the central adaptation that allowed our branch of hominins to survive when others did not. It goes hand in hand with personal autonomy as a core value of hunter-gatherers even today.
"Western individualism tends to pit each person against others in competition for resources and rewards. It includes the right to accumulate property and to use wealth to control the behavior of others. In contrast, as Tim Ingold (1999) has most explicitly emphasized, hunter-gathers’ sense of autonomy connects each person to others, in a way that does not create dependencies. Their autonomy does not include the right to accumulate property, to use power or threats to control others, or to make others indebted to oneself. It does, however, allow people to make their own day-to-day and moment-to-moment decisions about their own activities, as long as they do not violate the band’s implicit and explicit rules. For example, individual hunter-gatherers are free, on any day, to join a hunting or gathering party or to stay at camp and rest, depending on their own preference."(source)
They don't tolerate hierarchy in part because they don't want somebody else telling them what to do or acting in entitled ways that might endanger the health and wellbeing of the band.
