I've read that Philip II of Macedon said that if he had listened to Demosthenes, he would have declared war on himself. Ref. (it's an old book, and in Spanish): Historia de la literatura griega, 2, ...
I'm trivially curious to know how the British (colonial) and Spanish (colonial) Empires compared against the Mongol (~Genghis Khan) and Macedonian (~Alexander) Empires. The comparison I'm interested ...