[On the Instability of Republics]

[Professor X]

Actually Ms. FoxyBunny, I can name a succession line of five sovereigns who were benevolent, sagacious and morally upright: the rulers of the Nerva-Antonine Principate [96-180 CE] or Nerva, Trajan, Hadrian, Antoninus Pius and Marcus Aurelius.

Very well done!
[No sarcasm intended]