I love it when people start asking the right questions. I think the absolute mess of responses just goes to show that this is an avenue of discussion that hasn't been pursued nearly enough in leftist circles.
We've interacted before - you may remember my comments on an earlier post of yours. I am generally of the position that narcissism lies at the core of all of the issues that anarchism is fundamentally trying to solve. If we can solve the issue of narcissism in society, then everything else more or less falls into place (though there are a lot of misconception about what is and is not hierarchy that gets in the way of seeing that for a lot of people, apparently - I'll try to address some of that).
What if we started seriously discussing tactics for dealing with domination-seeking behavior?
Since we can reduce our political/social problems down to this particular psychological problem (or at least I claim that we can, more or less), then we can try to understand hoe we might address those political/social problems by understanding how one addresses this psychological problem. Unfortunately, we immediately run into a bit of a trouble. There is no known effective treatment for this personality type/disorder. When we consider that we're talking about trying to change a person's personality, this sort of make sense, and it make additional sense when we consider that impaired empathy generally shows up on a brain scan as a sort of brain damage. In other words, our options are severely limited at the individual level. We also know that this personality type is extremely stable over the lifetime of the individual.
There are lots of things we might be able to argue from that position, but one point that I really want to highlight is that we cannot expect that we can make this problem go away simply by changing the material or social conditions of these people. Even a dedicated therapy effort doesn't really work. While we can largely prevent the creation of these individuals in the first place if we were to create the right social/cultural environment (most are made as infants and children by a variety of bad parenting practices), we cannot completely prevent them from occurring (some are simply born this way - about 1% of the population as I had said before). As such, the solution to this problem isn't going to be a simple change in initial conditions, but rather an ongoing process that is baked into the fabric of society itself.
Let me touch on the issue of how we went from a bunch of societies that existed for millions of years while reliably and robustly preventing these people from gaining power and making a mess of things to a society that is basically run exclusively by these people and seems designed to empower them. As you know but others may not yet be aware, I have a hypothesis about how hierarchical civilization came to be. What's important to observe about this narrative is that the peaceful egalitarian societies did not voluntarily become hierarchical. They were coerced/conquered by hierarchical societies that formed from the aggregation of their exiles. This story of hierarchical societies devouring egalitarian ones via conquest and subjugation then repeats itself over and over again throughout history. A question for the room: Is there any documented instance of an egalitarian anarchist society voluntarily reforming itself to become hierarchical?
My basis for anarchism is fundamentally founded in this perspective that narcissism is the root problem to address. IMO, the indigenous people largely did a good job - they just made the mistake of externalizing their narcissism problems, and then the additional mistake of failing to prepare for the consequences of that decision. We just need to learn from their mistakes, and do what they did not: In addition to aggressively policing the narcissists that emerge from within, we need to account and prepare for the external threat represented by narcissistic individuals that exist outside of our society. Even a society that solves the exile problem for itself will still have to deal with the exile problem from others, and that generally means maintaining a strong military or otherwise maintaining some mechanism for defending itself against organized threats from hierarchical societies.
What mechanisms help us identify and isolate that kind of behavior without reproducing the same old coercive structures?
Identifying these bad behaviors is both easy and hard. If you know what to look for, it's really easy. If you don't, you're liable to fall for their manipulation. Simply learning about the various manipulative behaviors that narcissists engage in is the conceptually most straight-forward way to address this problem, and it is certainly effective. There are other ways, though. One thing that I've noticed is that narcissists will pretty reliably violate the rules of epistemologically sound argumentation whenever they start to try something funny. Simply educating people about logic (and logical fallacies) and the burden of proof would go a long way toward making them resilient to narcissistic manipulation. If we also teach people to take such violations very seriously, rather than just dismissing it with a simple "everyone is entitled to their own opinion", we would catch a lot of bullshit very early and stop a lot of narcissistic machination before it has a chance to gain any real traction. If you think about it, tolerance of unsound argumentation is a necessary condition for a society to be vulnerable to non-violent manipulation from bad actors of any sort.
How do we build systems that are resilient to sabotage without falling into authoritarian logic?
I'm seeing a lot of people in the comments conflating centralization with hierarchy, and vice-versa, and this is a big problem. I want to make something very clear: Centralization does NOT imply hierarchy. This is very important to understand, as discarding the useful tool that is centralization out of fear of creating the horrible monster that is hierarchy will cripple our ability to achieve anything at all. But what is centralization? What is hierarchy? Why do people conflate the two?
Centralization is simply what happens when coordination or decision-making is delegated to a subset of the group. These coordinators or decision-makers take on apparently central roles because everybody needs the information/instruction that they provide in order to avoid doing redundant or pointless work. Centralization is desirable, because it means that people can specialize. Not everyone has to be involved in every process. Decisions can be made by those who are most qualified to make them, and everybody else can get on with their work without being interrupted about every little detail.
Hierarchy is what you get when you define an up-and-down axis of power. Some people are above others. Some people are below others. The people above have the power/authority to coerce the people below. Subordination is a crime that is basically defined as an individual defying the directives of an individual above them in the hierarchy. The existence of hierarchy does not strictly depend upon the existence of a particular social or governance structure within a group.
That said, hierarchies naturally tend to concentrate decision-making power in the hands of a few, and that's why hierarchy always seems to imply centralization in practice. It's hard to find examples of centralization that do not come with the trappings of hierarchy and coercion - you basically have to study the inner-workings of some worker-owned co-ops to find good examples. Combined with the fact that coercion is a concept that isn't part of common discourse (though I think that is starting to change), and it becomes easier to see why people might struggle to separate the two concepts.
We can have all of the benefits of centralized coordination without any of the drawbacks of hierarchy. We just need to establish a binding social contract that outlaws coercion, and aggressively enforce it. With these tools in hand, building public institutions or even a powerful military capable of rivaling modern civilization's best is all comfortably within the realm of possibility.