What was common in the history of formation and the beginning of the existence of the Slavic states?

All Slavic states were formed very hard. The Slavic tribes were scattered and their unification required great efforts and human sacrifices. Also, the Slavic states in the early stages were short-lived. Geographically, they were located in central and eastern Europe and they were constantly under pressure, either from the East Frankish state, then from Byzantium, then from nomadic peoples (Avars, Magyars, Bulgars, Polovtsians, etc.), then from sides of other Slavic powers. The Slavic states disintegrated without having time to form a solid system of government. But in their place new countries arose, stronger and stronger.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.