Leaving aside her influence on the UK and the Commonwealth, what little she was allowed considering the strict boundaries within which she was allowed to operate, most of the world looked to her her as an an example of graciousness and good manners, whether consciously or subconsciously measuring their own against hers.
Amid the regrettable coarsening of language in current society, the scoffing at etiquette and good manners, most of us instinctively know that graciousness and good manners constitute the oil that lubricates the everyday frictions we unadvoidently daily encounter in our interactions with others.
https://www.polishedmanners.co.uk/why-do-we-need-etiquette/
We could use some of that here on FR.