Attachment theory is a psychological, ethological and evolutionary theory that provides a descriptive and explanatory framework for understanding interpersonal relationships between human beings. Presented by John Bowlby, the important principle of this theory is that an infant must develop a relationship with at least one primary caregiver for their overall social and emotional development to progress. The idea of ​​attachment theory is that infants become attached to adults who are responsive. and responsive in social relationships with them, and who remain constant caregivers for a few months during the period from the beginning of six months to two/three years. Initially, Bowlby was criticized by academic psychologists and also ostracized by the psychoanalytic community but, Attachment theory became a dominant approach in understanding social development and gave rise to empirical research into relationship formation narrow spaces of children. The child observed for this article is my 5-year-old nephew. He is currently in first grade and has some characteristics of an anxious and ambivalent child (discussed in the story).HistoryAfter graduating from Cambridge University in 1928, Bowlby volunteered at a school for troubled children while by reconsidering your career goals. Her experiences with two children at school put her professional life on the right track. One of them was a very isolated, isolated and affectionless teenager who had been kicked out of his old school for stealing and who had no stable mother figure. The second child was an anxious boy of 7 or 8 who followed Bowlby and was known as his shadow (Ainsworth, 1974). Convinced by this experience of the effects of early family relationships, he...... in the middle of the article ......how attachment from early childhood is necessary for the healthy development of the child. Children need to have a sense of security so that they can grow into healthy, productive adults, but if there is a lack of attachment with them, they are at higher risk of developing social, emotional, or behavioral problems during childhood. childhood or adolescence. An insecure attachment developed because the primary caregiver (mother) did not always respond to him in a warm, affectionate, loving, reliable, and sensitive manner. These babies are more likely to develop a mental representation of the world as hostile or indifferent, which leads to many psychological disorders. Adolescents who have not developed secure attachment tend to be prone to depression and anxiety and are more likely to become involved in substance abuse and antisocial/sexual activities. (Doyle, 2000)