Memory is the basis of any psychological phenomenon. Without participation of memory, we would feel and apprehend things over and over again as if we have felt them for the first time, which would make impossible the cognition of the world. Memory ensures integrity and unity of personality. Individuals and society cannot function without memory.
Throughout centuries, many theories (psychological, physiological, chemical, etc.) of memory’s essence and regularity have been drawn. They emerged in various psychologies in attempt to find their own answer to all these questions. Currently, there is generally no accepted theory of memory, which, nonetheless, doesn’t prevent practitioners from using different practices rather successfully.
There are dozens of hypotheses, theories, and schools trying to explain the phenomenon of memory; however, a consistent theory is yet to be built.