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I will express my opinion, which partially coincides with yours.
One can conclude that a "Heroes Society" exists, based on the common traits found in different "racial" societies.
Specifically, these are the basic units that make up society:
1. The presence of social groups.
2. Lords - rulers, practically Gods.
3. Creatures - those who are subordinate to the Lords. Neutrals are outside of society, like marginals.
Furthermore, the social groups themselves:
1. The highest level - the race, they are absolutely different, except for the goals of existence - self-development, self-care, etc.
2. The social class of Lords - they directly manage and direct the development of the race.
3. The social class of Creatures - they are subordinate to the Lords, the workforce, the warriors.
4. Subclasses: for Lords - mages, warriors, battle mages (for Heroes of Might and Magic III); mages, archers, swordsmen (I don't remember the names - for Heroes of Might and Magic IV). Creatures are divided into subclasses by levels; they can also be divided into magical (having features related to magic), warriors (having features related to military art), and ordinary. The latter division is rather conditional.
5. Family - the cell of our society, but not the society of Heroes. No Lord can marry a Creature (I haven't heard of it). Lords marry their own kind, but such marriages are rare (Roland and Catherine).
Society is characterized by stable social connections. For example, humans and demons are eternal enemies. Social classes and subclasses are also characterized by these very connections. A large response with numerous details could be developed here, but I will not do that. I will only give an example: the struggle of lords for rivalry within the race, the joining of foreign armies (in Heroes of Might and Magic IV), etc.
Thus, the Heroes Society exists and develops.
Development is manifested in the fact that, as Dreamer rightly pointed out, races conquer lands or migrate. Again, the laws of dialectics come into play. However, perhaps there are other examples of all kinds of development (because it can be not only extensive but also intensive, not only quantitative but also qualitative)?
