Chivalry is alive and well.
It's etiquette that's dying off.
While chivalry is more than just opening doors, etiquette is more than just knowing which silverware to use.
Etiquette :a code of behavior that delineates expectations for social behavior according to contemporary conventional norms within a society, social class, or group. The French word, signifying ticket (of admission, etc.) first appeared in English in 1750
Chivalry :a term related to the medieval institution of knighthood. It is usually associated with ideals of knightly virtues, honor and courtly love. The word is derived from the French word chevalier, indicating one who rides a horse (Fr. cheval). Today, the terms chivalry and chivalrous are used to describe courteous behavior, especially that of men towards women.