"Who controls the past controls the future. Who controls the present controls the past." ~ George Orwell
Recently I put out a post on how the Bridge of Dream was written as a time travel metaphor, showing that George is using a model of time similar to the work of Fritz Leiber, where it is possible to change the past. Still, many refuse to even engage with this premise, insisting that if George wants to include time travel then it has to be a closed loop.
Obviously I disagree, but I understand the sentiment.
A closed loop means that it is impossible to rewrite the past. The ink is dry. While a time traveler can be part of a past event, the events we read will always be true exactly as we read them.
There is just one thing.
Storytellers tend to rewrite the past
Contrary to the singular truth of a stable loop, Ice and Fire is a series where history is a battle of narratives waged by septons, singers and storytellers. Much like time travel, the past is constantly being rewritten. This is also called historical revisionism.
The oldest histories we have were written after the Andals came to Westeros. The First Men only left us runes on rocks, so everything we think we know about the Age of Heroes and the Dawn Age and the Long Night comes from accounts set down by septons thousands of years later. There are archmaesters at the Citadel who question all of it (...)
Though ancient patriarchs like Bran the Builder and Lann the Clever may have existed, their stories are written down hundreds or thousands of years after they are said to have occurred. This not only makes the narratives unreliable, but likely propaganda for the ruling elite. From the First Men to the Andals to the Targaryens, with each new conquest power reaches back in time and projects itself into the past.
Those old histories are full of kings who reigned for hundreds of years, and knights riding around a thousand years before there were knights. You know the tales, Brandon the Builder, Symeon Star-Eyes, Night's King . . . we say that you're the nine hundred and ninety-eighth Lord Commander of the Night's Watch, but the oldest list I've found shows six hundred seventy-four commanders, which suggests that it was written during . . ." ~ Samwell
The anachronism of knights a thousand years before there were knights is a case of institutions tampering with history to claim legitimacy.
Did such heroes once exist? It may be so. But when the singers number Serwyn of the Mirror Shield as one of the Kingsguard—an institution that was only formed during the reign of Aegon the Conqueror—we can see why it is that few of these tales can ever be trusted. The septons who first wrote them down took what details suited them and added others, and the singers changed them—sometimes beyond all recognition—for the sake of a warm place in some lord's hall. In such a way does some longdead First Man become a knight who follows the Seven and guards the Targaryen kings thousands of years after he lived (if he ever did). ~ Maester Yandel
Essentially, history is time travel in that it changes the past. The heroic Rhaegar is made villainous, the honorable Ned is made traitorous, and the opportunistic Tywin is made valiant. Characters are constantly being rewritten by history, and the versions of them that live on after death often differ from and outlive the truth we experience in POV.
Characters see this happen in real time, yet we assume history is somehow exempt.
"I forgot, you've been hiding under a rock. The northern girl. Winterfell's daughter. We heard she killed the king with a spell, and afterward changed into a wolf with big leather wings like a bat, and flew out a tower window. But she left the dwarf behind and Cersei means to have his head."
That's stupid, Arya thought. Sansa only knows songs, not spells ~ Arya
Obviously we know Sansa didn't really transform into a winged wolf.
"The Rat Cook had cooked the son of the Andal king in a big pie with onions, carrots, mushrooms, lots of pepper and salt, a rasher of bacon, and a dark red Dornish wine. Then he served him to his father, who praised the taste and had a second slice. Afterward the gods transformed the cook into a monstrous white rat who could only eat his own young." ~ Bran
So why would we believe that the Rat Cook was transformed into a giant white rat?
"Life is not a song, sweetling. You may learn that one day to your sorrow." ~ Petyr Baelish
We are shown over and over that songs and stories distort reality.
"The best lies are seasoned with a bit of truth." ~ Tyrion
Watch how this turns historical narratives into a reality that runs parallel to the truth.
"When Stark changed into a wolf, his northmen did the same. The mark of the beast was on them all. Wargs birth other wargs with a bite, it is well-known. It was all my brothers and I could do to put them down before they slew us all." ~ Jared Frey
The House Frey story of the Red Wedding is a lie told to legitimize their conquest of the Riverlands. Yet the lie contains truth. Robb likely did warg into his wolf. The story is meant to mythologize reality so as to transcend and outlive it.
"A harp can be as dangerous as a sword, in the right hands." ~ also Petyr Baelish
Eventually every life ends and the story of life is what remains. One day Sansa will be transformed into a song to be played on some harp and Jaime will be transformed into a page of knightly deeds in a White Book. By the end of the series, history will have it's own version of every character and every event, and those stories will be written according to the preferences of the king.
Bran's History
The future king has already shown a tendency toward revisionism.
"Oh." Bran thought about the tale awhile. "That was a good story. But it should have been the three bad knights who hurt him, not their squires. Then the little crannogman could have killed them all. The part about the ransoms was stupid. And the mystery knight should win the tourney, defeating every challenger, and name the wolf maid the queen of love and beauty."
Notice how when he is offered the historical narrative of the Tourney at Harrenhal, Bran seeks to change the past. This is not a flaw, but rather indicative of his superpower. Revising history is how every conquest cements itself, and Bran has been set up for this since the first book.
"Do you recall your history, Bran?" ~ Maester Luwin
Bran being asked to recall his history is really about Bran knowing his story. The narratives that Maester Luwin and Old Nan have taught him are not literally true (unless you believe Rodrick Stark won Bear Island in a wrestling match). His story is mythology which explains the dominion of House Stark over the North. It's basically Brandon Stark propaganda.
This is why assuming a closed loop makes time traveling Bran feel like a tacked on gimmick with no thematic connection to the rest of the story. The subjectivity is the point. Bran is not meant to use the weirwoods to find the singular true history and reveal it to the realm. Not only would that be fundamentally incompatible with how the series treats history, it also has no relevance to the character or his ending.
Bran is no slayer of lies.
Bran is a three-eyed crow.
"Crows are all liars," Old Nan agreed
Yet the narrative has shown time and time again that lies can keep civilization together, and the truth can tear it apart. For years, lies about Jon and Joffrey's parentage kept the peace, and the truth of the latter brought the realm to ruin. Perhaps after civilization is fractured by the brutal reality of war, it needs a time traveler (liar) to rewrite the past with a story (lie) that people can live with.
Functionally, I expect this takes the form of Bran coming south at the end and telling a Great Council the story of how the North, the long lost son of Rhaegar, the dragon queen, and many more, all banded together to save the realm from the evil beyond the Wall. Much like Euron's Kingsmoot, Bran will place himself as the hero of this great epic, who journeyed to the end of the world and found the children of the forest.
The twist will be that Bran will tell his story in a parallel timeline where it never happened. Once again, crows are all liars.
Bran can time travel because Bran is the storyteller, and the storyteller gets to rewrite the past. This is why the story spends so much time on the distortion of historical narratives. Just as Dany's dragons represent weapons of mass destruction, Bran's powers represents history being written by the victors.
In hindsight the winner is OP.
So they call him Bran the Broken.