Understanding, development, and significance of state sovereignty in international and domestic relations are a constant and burning issue of scientific research. However, over the last years, there is a growing tendency in the foreign and Russian science aimed at the disavowal of the concept of the sovereignty as an inalienable, undivided, and absolute power of the state, which leads both to the scientific disputes and the growth of tension at the state-by-state (international) level. The abovementioned determined the goal of this work: the scientific substantiation of the sovereignty as the most important, enduring characteristic and the base attribute of a state, as well as the formation of the concept according to which state sovereignty should be considered as a political and legal axiom aimed at the creation of a modern secure world order. The understanding of state sovereignty developed over several centuries includes the ability of a state to form and implement an individual, independent, and integral foreign and domestic policy, which means the supremacy of the state in the domestic and foreign policy. However, there are significant disagreements in understanding the nature, scope, implementation mechanism, and other factors of the formation and development of state sovereignty. In the paper, the author attempts to comprehend the pluralism of views on the concept of state sovereignty and to identify the consequences of artificial reducing the authority of the state sovereignty concept, proposes the justification for the inadmissibility of its disavowal. The author concludes that the concept of state sovereignty is actually the most important property of any state and scarcely depends on the influence of external factors, i.e. the sovereignty of the state cannot be limited since this contradicts, first of all, to its essence, and the disparagement and appeals to the state sovereignty abolition are the most dangerous tendency significantly increasing the level of tension in the world. State sovereignty is a symbol, the ideological framework of the world order and the existence of any state.