My $0.02 input.
Good manners and the strict observance of etiquette under all circumstances.
Etiquette towards family, friends, business associates, right down to the beggar on the street.
The observance of respecting anothers dignity, even when offended by them. Hard to do!
Diplomacy. The practice of making the other person feel important.
The clothing, cars, boats, houses & cottages, no matter how expensive, cannot hide an ill-mannered person for long. Good manners...