The first and most important educators of a child are his parents. Children observe, adopt and adapt their behavior as they see fit. Depending on environmental factors and their own childhood experience, parents will consciously or unconsciously choose an educational style that will create an emotional atmosphere within which the child will develop. In addition to the already known parenting styles, there are some contemporary parenting styles such as hyper-parenting and excessive indulgence. These styles are the result of an accelerated lifestyle that results in a lack of time to think better about educational practices. The importance of parenting style is evident in the research of scientists who state that the developmental outcome of a child largely depends on the parent's parenting style. The authoritative style stands out as authoritative because it is characterized by a high level of warmth towards the child and an appropriate amount of supervision with setting clear boundaries of behavior. Children of authoritative parents show positive developmental outcomes such as developed social skills and the ability to regulate emotions. Each parent will define the boundaries of behavior depending on the values they nurture and want to pass on to their child. It is important to set boundaries of behavior from an early age because they help children prepare for future life and successful action in society. Defining boundaries provides children with safe circumstances in which they can explore the way the world works. Examining boundaries leads to conflicts that are important to resolve in a way that parents show consistent and appropriate authority but also respect the child's personality at the same time. Depending on the resolution of the conflict, it can have a positive or negative impact on the child, his upbringing and the future relationship between the child and the parents. Conflict resolution through caring communication helps a child develop into a responsible and confident person. Harmful conflict resolution mechanisms raise dissatisfied, hypersensitive, and dependent children who will base relationships with other people on control. This paper will explain more closely the importance of establishing boundaries in children's behavior and will show in more detail the consequences of a lack of authority on the overall upbringing.