Us it seems to often, that a main line of healthy relations is harmony. We aspire to the absolute mutual understanding, as sure that it is a synonym of happiness and prosperity. Any disagreements with a partner we perceive very painfully, as us it seems to that they signify the end beginning.The known psychologist Edward Троник and paediatrician Claudia Голд prove that human co-operation is much more difficult and tangled, than we got used to think. From their point of view, conflicts not only needed but also extremely important for our social, personality and emotional development. In the book they explain that misunderstanding and quarrels is inevitable, and overcoming of disagreements is the most faithful way to establishment of truly strong mutual relations with romantic partners, family, friends and colleagues.In Russian language published first.