Abstract: The article considers a topical modern phenomenon of international relations - the role of private military firms and their connection with the national interests of states, which is the object of this research. The author attempts to trace back the process of establishment of the modern form of private military firms and extend the periodization of this process. The author considers and generalizes the works of outstanding Russian researchers and military experts. This interdisciplinary research is at the nexus of political science, law, history and economics. The author gives special attention to specific publicly available information about the largest and the most influential private military firms and their incomes and the most controversial operations. The author believes that most modern private military firms are state-originated, have emerged as a result of privatization of state functions, and serve as an example of government outsourcing. Based on the analysis of the works of leading military experts, the author develops a specific classification of the phenomenon of private military firms, the pros and cons of their use by states and trans-national corporations, and specifies the main services private military firms offer. Special attention is given to the issue of “sovereign interests” in the use of private military firms. The author supposes that the research also explains the problem of underdevelopment of international legal basis regulating the activities of private military firms. 
 

Keywords: globalization, outsourcing, privatization of state functions, history of mercenary activity, Montreux document, national interests, private military companies, periphery of international relations, geopolitics, private security companies

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