Speculative fiction is a softer way to talk about our reality, but we have to take care. If you really want to convice you can't force them to agree you, and if you don't listen, understand their point of view and you disrespect them, then they will not trust you to be conviced by you.
Not always fantasy kingdoms are a reflection of our real past, but sometimes they may be reflection of our dreams, or our fears. Wakanda was created as an Utopia to show us Africans have the potential to create a better future if they fix their troubles. An utopian realm as Wakanda is possible in a D&D world if their people are enough honest, worker and competent, and rules by the right managers or administrators and the right recipe of economy about free market. Remember the dessert is becoming a garden or orchand in Israel.
Sometimes I have tried to created plots about arcane and divine spellcasters because the cleric tell they want to defend us but we have to obey their rules, and they want to controll the mana lines, and wizards are envidied and feared by the muggle masses, and they don't want the mana sources by controlled by the clerics. They like nothing to be controlled by anybody who doesn't suffer consecuences when makes a mistake.
Osse is the equivalent to Australia in Abeir-Toril. I would add elemental planar gates where alien visitors arrive from the world of Athas (Dark Sun). And Abeir, the twin brother of Toril may be a place where add new or strange things.
We can't forget the other planets in Realmspace. Karpri and Chandos are two oceanic worlds.
