There is a wide literature on Latin forms of address. Eleanor Dickey's monograph published by Oxford University Press is a good survey.
There is a wide literature on Latin forms of address. Eleanor Dickey's monograph published by Oxford University Press is a good survey.
https://www.elisamotterle.com/galateo-del-tu-del-lei-e-del-v...
https://www.treccani.it/magazine/atlante/cultura/Diamoci_del...
Beware the treccani is the most used/influential encyclopaedia in italy, so I’d tend to say that i trust them a lot
> In antichità, quando si parlava latino, le formule di cortesia non esistevano … L’usanza del Voi nasce insieme a una nuova formula politica: la tetrarchia introdotta nel 293 da Diocleziano.
It was an innovation in Romance that took place centuries after Caesar and most of the Imperial era. Again, there is ample scholarly literature on this, so no need to resort to popular references like encyclopedias.
Or the plague and the subsequent Arab invasions. The empire was rebounded several times from near collapse after the 300s