What is the basis for the formation of such social communities as Catholics, Orthodox Christians, Protestants?

They are formed from the form of religion that a person adheres to. Of course, they can be generalized by saying that these communities are Christian. But in fact, there are significant worldview differences hidden in them. For example, among Catholics, God and Jesus are equally divine, and the Virgin Mary is also highly revered. And for the Orthodox, only God has a supernatural essence, and Jesus and the Virgin Mary are people.

One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.