To what extent are modern Greeks descended from Zhihu?

Today's Greeks are direct descendants of the inhabitants of the Byzantine Empire.

The ancient Roman Empire was divided into the Western Roman Empire and the Eastern Roman Empire (Byzantine Empire).

The inhabitants of the Byzantine Empire are: descendants of ancient Greece, Romans, Slavs, Germans, Egyptians, West Asians, etc. But because Greek culture is a strong culture in the empire, Greek is the lingua franca, and Latin is a minority.

Gradually, in the core areas of the Byzantine Empire (Greece, Asia Minor), a Byzantine nation with Greek as its mother tongue was formed through integration.

After the destruction of the Byzantine Empire by the Turks, many Byzantines accepted Islam, were assimilated by the Turks and spoke Turkish.

Byzantines who refused to convert insisted on speaking Greek and believing in the Orthodox Church. Therefore, these people are called "Greeks". They are the direct ancestors of modern Greeks, and they are a nation formed by the mixed blood of ancient Greeks and other nationalities.

Modern Greeks mainly live in Greece and Cyprus, and some are scattered in Turkey, the Caucasus and the Balkans. Their Greek is very different from ancient Greek.