How many factions are there?

Here's a question: what exactly constitutes a "neutral" faction? And even the concepts of "good" and "evil" are very relative. For example, Haven is considered "good," but in the second campaign, they behave quite ruthlessly. And the Tribes of the East are considered "evil" (as one of the developers of Heroes of Might and Magic V said, they were created based on R.A. Salvatore's book "Dark Elf," and after reading it, I have to agree – they are indeed very similar. In that book, the Dark Elves, or Drow, were truly rare and ruthless individuals, far surpassing even demons!). But in all the campaigns, they "do good," as Shura would say. And in the case of the Tribes of the East, it's just unbelievable – Necromancers are actually "good" too!