[etrevino]

The Mongolian Empire lasted for centuries as a series of successor states. It wasn't a collapse. It was just divided among the family. Those states stayed stable for quite awhile, with one of them taking over China.

[craftyguy]

I'm not sure I would classify "disintegration into competing entities" as a "stable" empire.

0. https://en.wikipedia.org/wiki/Mongol_Empire#Disintegration_i...