How the Borg Probably Got Started

This is my theory on how the Borg got started. Of course it's not cannon, but as there is no cannon explanation my theory has just as much authority as anyone else's. As I have stated before, Star Trek is a system of mythology, and as such it has it's own history and rules. Whenever you know history it's possible to make predictions, both about the future and past (in the real world as well as a fictitious world).