Word of the day: comity
In legal language, there is a term comity of nations which is the friendly recognition accorded by one nation to the laws and and usages of another.
More generally, the word comity means mutual civility or courtesy.
I came across the word in a profile of the new US President Joe Biden which suggested that comity is part of his political style. Sounds good to me.
Comity derives from the Latin comitas, courtesy, and from cemis, friendly, courteous.