Why did the building collapse for no reason?

First, it may be that you didn't worship your ancestors in time. If the ancestors are angry, it will lead to earthquakes, floods, fires and so on, leading to the collapse of architecture and science.

Second, it may be the need of historical events. If it is a battle, there will be an earthquake at some checkpoints, so the building you built at the place where the earthquake happened will inevitably collapse at this time.

Anything else? . . . System BUG? = =