Our periodization (being cyclic by its nature) of the socio-historical development is constructed on the basis of the biunited socio-psychological process of development of a person and the society. In this case, it is understandable that a social essence reveals itself both on the public level and the personal one. The properties of these subjects are transformed in the process of transition from the individual state to the collective one. A group thinks, feels, and acts otherwise than its individual members.
