What early Russian civilization prosposed from river trade between Scandinavia and the byxantine empire?

The early Russian civilization that prospered from river trade between Scandinavia and the Byzantine Empire was Kievan Rus'. Kievan Rus' was a loose federation of East Slavic tribes that existed from the late 9th to the mid-13th century in what is now Ukraine, Belarus, and western Russia.

Kievan Rus' was founded by the Varangians, a group of Scandinavian traders and warriors who had established themselves in the region in the 8th century. The Varangians quickly assimilated into the local Slavic population, and their descendants became the ruling class of Kievan Rus'.

Kievan Rus' was ideally situated for trade between Scandinavia and the Byzantine Empire. The Dnieper River, which flows through Ukraine, connected the Baltic Sea to the Black Sea, and from there to Constantinople, the capital of the Byzantine Empire. Kievan Rus' also had access to the Volga River, which connected it to the Caspian Sea and Central Asia.

Kievan Rus' was a major trading center, and its merchants traded a variety of goods, including furs, honey, wax, slaves, and luxury goods from the Byzantine Empire. Kievan Rus' also became a center of learning and culture, and its monasteries produced some of the most important works of medieval literature.

In the 13th century, Kievan Rus' was invaded by the Mongols, who destroyed the city of Kiev and drove the Rus' princes into exile. Kievan Rus' never fully recovered from the Mongol invasion, and it eventually fragmented into a number of smaller states.