Courteous

Etiquette (/ˈɛtᵻˌkɛt/ or /ˈɛtᵻkᵻt/, French: [e.ti.kɛt]) is 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 , literally signifying a tag or label, was used in a modern sense in English around 1750. Etiquette has changed and evolved over the years.

In the 3rd millennium BC, Ptahhotep wrote The Maxims of Ptahhotep. The Maxims were conformist precepts extolling such civil virtues as truthfulness, self-control and kindness towards one's fellow beings. Learning by listening to everybody and knowing that human knowledge is never perfect are a leitmotif. Avoiding open conflict wherever possible should not be considered weakness. Stress is placed on the pursuit of justice, although it is conceded that it is a god's command that prevails in the end. Some of the maxims refer to one's behaviour when in the presence of the great, how to choose the right master and how to serve him. Others teach the correct way to lead through openness and kindness. Greed is the base of all evil and should be guarded against, while generosity towards family and friends is deemed praiseworthy.

...
Wikipedia