The article examines the origin of the concept of human behavior. It was found that human behavior became the subject of study in various fields of knowledge. The origins of the formation of the concept of human behavior go back to Antiquity, which can be traced in the works of famous philosophers and thinkers. In this period, the concept of justice and coexistence of members of society was considered. It was established that Christianity had a significant influence on human behavior, which became the starting point in the formation of human behavior, worldview and, as a result, the creation of formal rules that gradually spread to all spheres of human existence. Historical events that were important for changing paradigmatic ideas about human behavior can also be traced during the First and Second World Wars, because it was during these tragic times that the very value of a person and his life, health, honor and dignity acquired a different color, which also influenced behavior and its interpretation. Human behavior can be considered based on age, value, social, moral, somatic, economic, labor, political markers, etc. The formation of human behavior begins at an early age, and parents are primarily agents of the child's socialization and guides to an independent life and in the process of the child's initial learning of his own reaction to events and the differentiation of positive and negative behavior, which builds the basic framework for his further interaction with the surrounding world. All these components affect the further formation of certain standard patterns in a person, which he subconsciously uses as a reaction to the surrounding world. Considerable changes that took place in the post-war period and in the postmodern period are studied. Attention is focused on the change in human behavior in the present.
 The impact of the war on the behavior of children and youth, which underwent significant changes, was analyzed.