See also Villani, I 38, who assigns a different reason for the Florentine dissensions:⁠—

“And observe, that if the Florentines are always in war and dissension among themselves it is not to be wondered at, they being descended from two nations so contrary and hostile and different in customs, as were the noble and virtuous Romans and the rude and warlike Fiesolans.”

“And observe, that if the Florentines are always in war and dissension among themselves it is not to be wondered at, they being descended from two nations so contrary and hostile and different in customs, as were the noble and virtuous Romans and the rude and warlike Fiesolans.”