I was thinking about how relations of dominance and hierarchy common in primates got replaced by more egalitarian communities in early humans. Relations of dominance and hierarchy are inherently unstable as they breed resistance among those at the bottom, hence they tended to give way to more egalitarian relations - but today we live in a world in which dominance and hierarchy are the most prevalent social relations. I remember reading something that suggested that it was the unstable nature of hierarchy that led to it taking over, as egalitarian communities were more stable they had no reason to expand - when the hierarchical ones were driven by their instability to expand and conquer the egalitarian communities.
So the point of this that it suddenly occurred to me: maybe all this goes in cycles? Maybe humanity (or any particular section of humanity) will be flipping between the most prevalent arrangement being hierarchy to being egalitarianism and back every few thousand years or however long, for as long as humans exist. An anarchist conception of the future to strive for is one in which egalitarian communities replace hierarchical ones and become prevalent again, and maybe if this did happen everywhere they'd be more stable and it could last a while, but there's that possibility for something to go wrong in some community somewhere making it go hierarchical again, and start to conquer everyone else until its dominance is global in scope. Then this global system of dominance breeds resistance until eventually it falls and is replaced by egalitarianism again ... and the cycle repeats. It doesn't necessarily happen to be global either, each region might have its own cycles in which hierarchy and egalitarianism switch places as the most common relations, and only occasionally does one particular region end up in a hierarchical period that is "successful" enough to expand until its global in scope like we have today
idk this is kinda speculative but it makes a lot of sense to me