Huáscar

The imminent collapse before the tower divided by internal struggles
Every divided structure loses resistance before the final blow. External danger becomes devastating when it encounters a community consumed by conflicts that prevent it from responding as a single body. That warning appears while Huáscar is proclaimed heir in a Cuzco filled with uncertainty and, at the same time, Francisco Pizarro prepares a new expedition.
The two narrative lines advance in parallel. Within the Tahuantinsuyo there is debate over who should command; outside it, a force is approaching that will find an order weakened by that dispute.
A tower does not fall solely because of the blow it receives from outside. It falls when its own joints have lost resistance. That is the philosophical warning: power accumulated over generations can become fragile when its parts cease to recognize themselves in a common destiny.
Internal division leaves the Empire less prepared to face external danger and weakens its capacity to respond as one to ever greater threats, while eroding coordination, trust, resilience, and strategic unity over time.