Man's economic activity and his worldview are closely interrelated, and this relationship has attracted the attention of philosophers and scientists for centuries. When making economic decisions, a person entered into relations of cooperation, collaboration and/or competition and even war. Since ancient times, war was used by man as a tool for resolving economic conflicts and achieving economic interests and evolved along with the development of socio-economic systems and the worldview of man himself. The economic worldview and socio-economic systems, in turn, evolve under the influence of the development of economic activity, philosophical knowledge, science and technology. In the development of mankind, we can distinguish eras of dominance of a certain philosophical paradigm (classicism, modernity, postmodernity, metamodernity), which determined the worldview of people, the “spirit of the times”, as well as their economic activities, the choice of tools for resolving economic conflicts and achieving economic interests, including characteristics and distinctive features of wars. Since in the modern global world of the metamodern era, military conflicts have a significant impact on the economic decisions of economic entities, identifying the distinctive features of modern wars in conjunction with the philosophy of metamodernism is relevant. The purpose of the study is to identify the distinctive characteristics of war as an economic instrument in each of the above-mentioned eras in conjunction with the dominant philosophical paradigm and the characteristics of the socio-economic systems of the parties to military conflicts, as well as to substantiate the key features of war in the modern metamodern era. To achieve this goal, the following tasks were solved: a comparative historical and economic analysis of the wars of the eras of classicism, modernity, postmodernity, and metamodernity was be carried out; differences between them were identified according to a number of criteria. The relationship between the characteristics of wars and the dominant philosophical paradigm were identified. The role of war in the economy of metamodernity was determined. The research methodology was based on a synthesis of historical and economic methodology, a systemic economic approach, and comparative analysis, which determined the novelty of the research results: the rationale for the relationship of war as a tool for solving economic conflicts and/or realizing economic interests with the dominant philosophical paradigm.