One of the most interesting facts in Francis Fukuyama's The Origins of Political Order was that the most primordial form of human social groupings, small bands of hunter gatherers, are organised along egalitarian and democratic lines, without any recognisable leader.

There may be an individual who the other members of the band listen to more than others, but only due to their proven experience and wisdom. And there is no concept of authority, e.g. the ability to enforce a decision upon people against their better judgement.

More complex forms of social organisation and hierarchy are inventions, and relatively recent ones. I suspect that is why they so often display these kinds of dysfunctions. As a species, we haven't yet evolved the skills necessary to behave optimally in situations where we have to engage in constant non-violent negotiations with strangers over issues of power, authority, friendship, employment, sex, etc. Instead, we try to create institutions that enforce an optimum solution, but this produces a circular problem, because these institutions are prey to the same dysfunctions.