The Westeros History Lesson That Makes the Dance of the Dragons Inevitable

The war between Rhaenyra Targaryen and her half-brother Aegon didn’t start with a stolen crown. It was the violent conclusion to a political crisis decades in the making, sparked by one fateful decision that became Westeros’s original sin.

The King Who Created Peace—and a Problem

To understand the Dance of the Dragons, you first have to understand King Jaehaerys I Targaryen, the ‘Old King.’ He was the grandfather of King Viserys, and by all accounts, the most successful Targaryen monarch ever to sit the Iron Throne. His nearly sixty-year reign was a time of unprecedented peace and prosperity. He built the Kingsroad, codified the realm’s laws, and was beloved by lords and smallfolk alike. But in securing his own legacy, he planted the seeds of his family’s destruction. Jaehaerys and his wise Queen Alysanne had many children, but tragedy claimed his two eldest sons and chosen heirs. This forced a crisis. His line of succession became messy, creating competing claims among his grandchildren. Twice, he had to make a choice, and twice, he chose a male heir over a female one with an arguably stronger claim. In doing so, he wasn't just picking a person; he was informally establishing a powerful, patriarchal rule: the Iron Throne does not pass to a woman if a viable male alternative exists.

The Great Council of 101 AC

This informal rule was formally cemented at the Great Council of 101 AC. With his final heir’s death, the aging Jaehaerys knew the succession question had to be settled permanently to avoid a civil war upon his death. So, he summoned the lords of Westeros to Harrenhal to vote on his successor. The choice came down to two candidates: Princess Rhaenys Targaryen, his oldest grandchild from his deceased eldest son, and Prince Viserys Targaryen, his oldest male grandchild from his second son.

By some measures of inheritance, Rhaenys had the better claim. But the lords of Westeros, overwhelmingly, chose Viserys. The message was clear and became enshrined as precedent: a man’s claim, even a junior one, supersedes a woman’s claim. Rhaenys became known forever after as ‘The Queen Who Never Was.’ This council wasn't just a vote; it was a foundational legal and political statement on who was worthy—and who was not—of ruling Westeros. This is the history lesson that hangs over everything in *House of the Dragon*.

King Viserys’s Doomed Defiance

Decades later, King Viserys I—the very man who benefited from the Great Council's ruling—found himself in a similar bind. Without a male heir for years, he did something radical: he named his only daughter, Rhaenyra, as his official successor and made the lords of the realm swear oaths to uphold her claim. He was, in essence, trying to undo the very precedent that put him on the throne. He believed his word as king was enough to overturn a generation of established custom.

Even after the birth of his son, Aegon, Viserys stubbornly refused to change the succession. He spent the rest of his reign insisting that Rhaenyra would follow him, tearing his own court in half. He was fighting history. On one side were the ‘Blacks,’ who supported the King's declared will and Rhaenyra’s right. On the other were the ‘Greens,’ who supported Prince Aegon, arguing from the iron-clad precedent set by the Great Council. Both sides believed they were right, and both had a legitimate legal argument.

An Irresolvable Contradiction

This is what makes the Dance of the Dragons so tragic and inevitable. It wasn’t simply about greed or ambition, though there was plenty of that. The war was the result of a fundamental, irresolvable contradiction at the heart of Westerosi law: Does the King’s will trump tradition and precedent? Or does precedent, established by the Great Council, bind even the King?

There was no peaceful answer to this question. When Viserys died, the kingdom was faced with two incompatible claims, both wrapped in the cloak of legitimacy. The Greens crowned Aegon, arguing they were upholding the law of the realm. The Blacks supported Rhaenyra, arguing they were upholding the final command of their king. With two irreconcilable and equally plausible claims to power, the only remaining court of appeal was the battlefield. The dragons were destined to dance because the Targaryens had written a history that could only be settled with fire and blood.