I've always assumed that the Borg were once a truly egalitarian faction. One that seeks out other points of view in order to invite them into a collective where every voice has a share in the overall direction of the whole.

I could see such a collective evolving into the current Star Trek Borg if things like fascism take root. A rabid xenophobia of thought that seeks to destroy any 'wrong-think' within the hive mind.

It would explain a lot of the problems that the Borg seem to have. Why they never seem to learn from their mistakes despite their adaptability, why they all share one mind despite their quest for distinctiveness, why they have a single load-bearing queen despite their usual priority of hyper redundancy in all things.