The reason for the transition of the Eastern Slavs from paganism to Christianity.

You can name the political and ideological reason for the adoption of Christianity. The political reason was that Kievan Rus needed a high international authority, which would raise it to the level of Byzantium. The ideological reason was that the people of Russia were at that stage of development when it was necessary to make changes. True, even despite this, part of the population was still against the adoption of the new faith.