This text is a brief version of book "The Child's aggressiveness. Theory and practice of education collision-free".Beats and calls children, pushes and offends adults, breaks toys, yells and escapes, all does contrary to, threatens. Sometimes children are out of control, and when they grow into teenagers, a situation becomes truly dangerous both for surrounding and for them. In search of explanations, why children are "wicked", German psychologist Хартвиг Рем calls to the most authoritative in psychology theories - from a behaviourism to the psycho-analysis, and comes to the non-trivial conclusions. Before you is classic labour on psychology, bases of the modern understanding of aggressiveness are stopped up in that. Conclusions that were done centuries ago find all new practical proofs until now.There is an aggressiveness only in rare cases - it real internal abnormal psychology caused by organic violations in the nervous system. Much more often we deal with the purchased strategy of behavior, that a child considers most suitable for a that environment in that he grows. Cases described in a book from life it is illustrated well. The key to the difficult child needs to be searched in his emotionality: aggressiveness, as it did not sound paradoxically, it is a search almost always contact with other people, even if the method (fight, insults, etc.) chosen by a child seems to us, adult, inadequate. By virtue of vital circumstances some children are not able to communicate differently.We suggest to understand, that parents and teachers do not so| how to bring up a child, not breaking his psyche| and, finally, how to put right a contact with a child that became aggressive already. For plenitude of picture we complemented a review on a book by some data from researches of the last years.We remind that this text is a summary of book