International audienceIn this article, the author questions the complex links between global crises and wars. In the first part, he preliminarily develops the notions of crisis (sub-part 1) and war (sub-part 2), in order to re-situate them both in the current neoclassical mainstream in economics and in heterodox thoughts, with particular emphasis on Marxism. In a second part, it is the nature of the relationships between global crises and wars that is examined from an economic point of view, from both theoretical and historical angles (sub-part 1). Then, the systemic contradictions that such crises-wars relationships contribute to accelerate are analyzed (sub-part 2). Finally, the readers’ attention is oriented toward new underlying risks, ...