There are many ways in which we’re become much more polite than Americans were historically. Blatant bigotry is no longer tolerated by this society. It exists, but people get into trouble for practicing it. The obligation to be considerate of others has spread to include groups that were excluded at many times.

Judith Martin (b. 1938) American author, journalist, etiquette expert [a.k.a. Miss Manners]

Interview (2011-08), “Q and A with Miss Manners,” by Arcynta Ali Childs, Smithsonian magazine
    (Source)