Due to me seeing this post again, I decided to start re-reading Miss Manners Guide to Excruciatingly Correct Behavior, and all I can say is, this is a book Tumblr is really sleeping on.
It's not just the fact that this book is perfect for those of us who are neurodivergent, who can really benefit from having a book which kindly and patiently bothers to explain social rules and norms that people just expect you to know without ever telling you themselves.
It's also the fact that, despite this book being nearly 45 years old, Miss Manners makes it clear in the preface and opening chapters that she is explicitly against classism, sexism, and homophobia. She also makes it explicitly clear in the preface that her personal belief in the importance of good manners and etiquette has nothing to do with a desire to return to "the good old days", because those days were not actually good for women, LGBTQ+ people, poor people, and people of color.
What really made me re-fall in love with Miss Manners though was right in the opening chapter she addresses using sexualized threats and insults to debase and degrade others (you know, like "get fcked", or "suck my genitals", or "yeah well that's not what your mom / sister / other female family member had to say last night") because if sex is something that's supposed to be good and pleasurable, why are we using it as a threat to debase and degrade others? Honestly I love her so much for calling out the inherent sex-negativity of using sexualized threats and insults like that, and nearly 45 years ago at that!
Miss Manners has never been a stuffy old fashioned fuddy-duddy. She has always been a deeply compassionate woman far ahead of her time, whose sole mission is to make the world a kinder and more considerate place.