Nowadays, the word “civility” is often used to mean politeness or adherence to locally recognized norms that divide appropriate speech from inappropriate speech. You might, for example, be “uncivil” if you are too loud or too angry. Such norms can be helpful, but they risk suppressing authentic and justifiable emotions.
The word has a different origin, closely related to “citizen.” In republican political thought, it it can mean equal standing to participate in politics, rather like the classical Greek word isonomia (roughly: the right to look any fellow citizen in the eye and say what you think). Almost the opposite of etiquette, it connotes a kind of plain, direct, and honest speech.
As Renaissance Florence developed a full-blown ideology of republicanism, the city embraced norms, rules, and customs that were meant to convey the equal standing of all citizen men and to discourage distinctions of caste or power based on military might. Just as one example, no man raised his hat to another Florentine. Professional soldiers were led by paid foreigners, never by Florentines, and these mercenaries had to swear loyalty to the republic’s councilors. The plutocrat banker Cosimo de Medici was wise enough to honor republican norms and manipulated the city’s policies quietly through his networks, without seeking offices or titles or any special personal treatment.
The republic finally ended for good when Lorenzo di Piero de’ Medici, an heir of Cosimo’s vast fortune, got himself installed as a monarchical ruler and brutally suppressed dissent. A Florentine chronicler, Giovanni Cambi, noted that Lorenzo had been raised in monarchical Rome, where he had learned to expect deference. Lorenzo was surrounded by retainers who called him “padrone” and doffed their hats to him. This was evidence that he knew nothing of “civility”:
Guiliano de Medici, blood brother of Pope Leo X, who had ruled the city of Florence, was living in Rome, and deprived of the city government altogether. He awarded that government to his nephew Lorenzo. Because this Lorenzo had been a child when his father was expelled from Florence, when he returned to Florence he did not know a single citizen, and he was not used to civility (civilta), and instead he aspired to arms and to dominate; and he succeeded in that; for although most citizens were displeased, nevertheless in their ambitiousness and avarice, they pretended to rejoice.Istorie di Giovanni Cambi cittadino fiorentino, p. 67 (my trans.)
We might assume that doffing hats and using titles exemplifies civility–for better or worse. But the opposite was true in Renaissance Italy. Courtly politeness was a symptom of domination, incompatible with civic virtue and “civility.”
[I am drawing on Richard C. Trexler, Public Life in Renaissance Florence, 1991. See also: civility: not too much, not too little; what to do about the guy behind the desk; civic republicanism in medieval Italy: the Lucignano council frescoes; what does the word civic mean?]