This book explores the ontology of war and peace. Using the results of empirical and theoretical research in the field of geophilosophy, as well as neuroscience, psychology, social philosophy and military history, it defines axiomatics of the theory of war and peace; formulates its consequences; tests the theory on the geophilosophy of Europe; and offers a new theoretical basis for the definition of the European Security Strategy. The text proves that war and peace are ways to achieve a regulatory compromise between manifestations of the active principle, which was initially laid in the foundation of the human mentality, and the influence of the external environment through natural selection.