What was the progressive significance of Christianity for the peoples who adopted it?

What was the progressive significance of Christianity for the peoples who adopted it? And more What events led to the weakening of the position of Christianity in the North Caucasus?

Christianity contributed to the introduction to the great cultures of the Ancient world, the dissemination of sciences and literacy, as well as the creation of writing for the peoples who adopted Christianity. It is believed that it also contributed to a softening of morals in relation to women and children, servants, slaves, and so on, although one of the principles of Christianity was obedience to the authorities and in general to those above. As for Christianity in the North Caucasus, its positions were shaken after the fall of Byzantium and the victorious march of Islam.