Regarding the human development we can say that it represents a continuous evolution, from birth to adulthood. This involves physical processes (human body) and mental ones (thinking, memory etc.). In time, there were different theories that tried to explain this phenomenon. Thus, the theory of Progressive Development, shows that the only absent elements from the children's reasoning are those that they haven't come across or they haven't experienced. Some of them show that the children's

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... pment is not that predictable, but, even more; it goes through certain highly delimited stages. Each of these stages follows the previous one and is characterized by specific skills and abilities. This development based on stages is known under the name of the Theory of Stages or the Theory of Discontinuity. Piaget, Erikson and Kohlberg are some of the promoters of this of human development based on stages. What is the human being? This is another difficult question. Though, taking into consideration the elements that surround us, we can say that the human being is the result of the inheritance, of the environment and of education. These elements have an impact on the human being, thus, the will and the autonomy are both influenced by them. This article is the theoretical representation of a study that is to be completed by a practical research and a well elaborated methodology and has as a main objective, the influence of the environment, of the hereditary and psychological factors upon the mental development of the child. We wish to check the assumption starting with the development of the mental factors, the children develop in different ways, according to the external environment and to the hereditary factors, and so we wish to check it through a questionnaire about the way in which the teenagers adapt to the social life. The research question we will try to answer is "Can the environment and hereditary factors influence the child's mental development?" Education is an important factor in human mental development, so we address in this article the cause-effect method as a way to express the relationship between environment and heredity in the mental development of the child.