Why do people become proud of their ancestry?
First, one has not performed any service to "earn" the ancestry.
Secondly, I notice that the very people who are proud of their ancestry are those whose people have played virtually no role in world history in recent centuries or have made almost no contributions to culture or science.
This is also confirmed by a study in which people were asked whether their culture was superior to other cultures. The majority of Spaniards, French, English, and Germans denied it, but Georgians and Armenians were convinced it was true, followed by Balkan people.
What is the name of this psychological phenomenon?
If you project your own standard to the whole of humanity, it may seem strange.
However, pride is more individual. "deserve" you don't have to either – wherever this view may come from. You can be proud of something others have done. If it may also be insignificant in world history, it may also be significant enough for the individual. Be it for belonging, admiration or other motives.
the phenomenon is called " National pride ", and the most striking assessment comes from Schopenhauer, see https://www.gutquote.de/zitat_autor_arthur_schopenhauer_thema_stolz_zitat_19623.html
Right! I find Schopenhauer too pessimistic, but always sober and free of illusions
A sense of belonging you don't need to earn and not to justify, that's beautiful.
I don't know. This human phenomenon has always escaped my understanding. I'm grateful to live here. But I am only proud of my own achievements.