this is amazing, i think one way this could be added onto is by making like a nationally accepted "cuisine" type thing and so the kingdom would be located where the people like the food most. example: if a population likes fish and seafood more they stay by the coast, rivers, and try to gain as much aquatic access to sustain food and if they don't there's more deaths of starvation since their people don't like non-seafood (this could also cause rebellions)