The interaction of complementarity and mentality in the management of organizations: The monograph examines the impact of complementarity and mentality on the activities of companies. The essence of complementarity is revealed as a connecting process in social systems. The main features of a national character that determine the culture and style of business management are identified.It is confirmed that in addition to material, social and cultural factors and conditions influence the achievement of market goals by commercial organizations. Social and cultural factors determine the company's market capitalization.The competitiveness, image of the company and the reputation of its products and services depend on abstract key opportunities, such as complementarity, corporate culture, corporate spirit, corporate ethics and social responsibility. Now the task of each company is to find such intangible philosophical values and standards that would help to find its own culture of business management.