Structures and symbols. Abstraction - empirical fact

It all started with a stone ... there was a stone age. The person learned to do the first symmetrical things - chopped. A man suddenly began to distinguish between structures and create symbols, and this allocated it from the world of animals. The perception of structures and the production of symbols has since gone hand in hand. Both that and the other are abstract things. The perception and production of abstract things has become a distinctive side of people"s activities and the basis for the development of human civilization.
The book is devoted to the analysis of the process of awareness of structures that really exist in nature, regardless of man, and their representation in symbolic forms