What then does the future hold for the Six Kingdoms? I see a few paths:
First: and I think most likely, the Austria/Prussia solution: the Starks continue to interfere in the elections, dividing the Six Kingdoms, while slowly chipping away at them. At some point, the Stark claim on the Riverlands is pressed successfully, decisively shifting the balance between the two kingdoms. At some point, the Starks use their vote (as Lord of the Riverlands) to get another Stark made king, and then another and then another, until the Six Kingdoms are subsumed into the North in a personal union. Unlike weak king Bran, the future ruler of the North (let’s call her Queen Arya II) already has a strong base of power outside of the Six Kingdoms and the Crownlands, much like the Austrians and the Prussians, which she can use to rip away the autonomy of the constituent kingdoms. The wheel breaks at last, beneath the boot of an Empire of the North.
This is essentially what happened to the elective monarchy of Bohemia. One of the largest states of the Holy Roman Empire, Bohemia was also a kingdom and had an elected king. In the 1520s, they elected the Austrian Archduke Ferdinand to the kingship, and afterwards the Austrians Habsburgs, with their greater power and wealth were able to ensure the election of a succession of Habsburgs to the throne. In 1620, the Bohemians (many now Protestant) decided they had had enough of the Habsburgs (who were quite Catholic), but it was too late – an effort to elect a non-Habsburg triggered an invasion of Bohemia, cementing hereditary Habsburg control of the kingdom.
Second: Bran is too weak, militarily, to hold the Six Kingdoms together, and they dissolve into their constituent elements. Recognizing the danger of the North, this probably creates a shifting set of alliances to both jockey for power in the South and try to keep the North out, creating a system of interstate anarchy in which (to borrow Kenneth Waltz), “war is normal.” Nothing changes, the wheel turns again and again and again.
Third: The Lords of the Six Kingdoms, recognizing the grim futures available to them (and probably under pressure from the North), pull together behind a single dynastic claimant to the throne – probably a Baratheon (because the memory of Robert’s long summer will, over time, imbue his rule with a sort of friendly glow) descendant of Gendry. The new Baratheon monarchs will be endlessly troubled by Lannisters and Starks with competing claims to the throne and with the North – if a Targaryen claim can survive in exile, why not others? The wheel turns.
In short, I have no expectation that this new elective system in the Six Kingdoms will endure long. Ironically, almost anyone at the meeting in the Dragonpit, probably including Grey Worm, would have been a better choice for first elected monarch, over Bran.
The fundamental problem here is that Westeros’ problems arise out of its culture and norms, not from who sits on the Throne. Varys was always, in a way, wrong – the fate of millions never depended on who sat on the throne, it depended on the nature of that rule. We saw no evidence of any steps taken to change that. If anything, Lord Bronn will provide the sterling example of conquering lords and military adventurers for centuries to come, as House Blackwater became potentially the strongest House in the Six Kingdoms through pure violence, unfettered by loyalty or honor. So long as that kind of rule – personal rule through military performance – remains the gold standard of kingship, the violence will not stop here.
Our heroes, alas, have spun the wheel, not broken it, because they are a product of itand thus could not see beyond it. It is a very human failing, but not, perhaps, a very uplifting one.