Home education should include not only the etiquette rules necessary to navigate life, but the underlying principles of manners. These include respect (such as addressing people as they wish to be addressed), fairness (granting others the privileges one claims for oneself) and congeniality (not using threats as an argument).

Judith Martin (b. 1938) American author, journalist, etiquette expert [a.k.a. Miss Manners]
“Miss Manners,” syndicated column (2015-03-01)
    (Source)

This is often whittled down to "The underlying principles of manners -- respect, fairness, and congeniality."