Unified ideologies of factions in Heroes 1-5.

Related: In my opinion, the ideology of all factions in the 5th installment is banal and simple...
Necromancers - intelligent and dead
Elves - fanatical and independent
Humans - simply good and strong
Mages - arrogant and old
Demons - simply evil and red
Dark Elves - secretive and vengeful
Dwarves - indifferent and hot-tempered
Barbarians - crazy and cruel.

But I think you misunderstood the idea...

Take, for example, the Orcs. You said they are crazy and cruel. What nonsense. Orcs are kind of "mutants" of demons and humans. Therefore, they have a mixture of the "unlimited freedom" of demons and the order of humans. That's why the Orcs are a freedom-loving people, but with their own "concepts." They were probably assigned to the Dark faction because revenge has consumed their minds. They hate the creators, the Mages, their "ancestors," the Demons, and the Humans.
By the way, the Orcs live in the steppes of Ranaan, and in the game, they correspond to the Taiga region. The endless steppe perfectly symbolizes the freedom-loving nature of the Orcs, and the harsh taiga symbolizes their strength and resilience.

Demons are the personification of Chaos. They are the original evil that does evil simply because they do it. Although, it is not ruled out that they also have reasons for this. Perhaps, at first, they were chaotic beings, strong, possessing power, and sowing chaos. And then they weakened, and they were imprisoned. Here, the desire of the original chaos merged with revenge. And think about it - Chaos is unlimited, unorganized freedom. And imprisonment only intensified the desire for freedom and the desire to sow chaos. I think that's how the ideology of modern demons was formed.

Dwarves, in my opinion, are the least developed or poorly thought-out race. Unlike other races, they do not have a more or less accurate ethnic analogue in our world (except perhaps partially Scandinavia and Scotland). And they are largely copied from the classic Tolkien Dwarves. Their ideals are probably honor, their own, of the clan, and of the state. There is nothing else known about their ideals. But here is another point - weapons - it pleasantly surprised me. In AsKhan, Dwarves prefer weapons that can be used both during war and during peace, i.e., hammers, pickaxes, and so on. Now it is clear why there are no classic axes - there is simply nothing to chop with them. Only spears are unclear why. You can't really use them in caves.
Also, I didn't like the city. There is an expression "pointing a finger at the sky," but here it is the opposite. Why did the Dwarves get snow? Dwarves generally live in the mountains, not in holes and not in Antarctica.

Mages - their ideals correspond to the ideals of the Renaissance: man is the center of the universe, man can do anything. The style is very interestingly chosen in contrast to the style of the Necromancers - dead against undead.

Necromancers - classic sectarians. They took a normal idea - order - and distorted it. That's not cool. Order means order. Let's change it, so that order means death.