This book aims to analyze in depth the consequences of this conflict. But it is not simply a matter of documenting yet another crisis. The ambition of this work is to defend a central thesis: the war in Ukraine was not the primary cause of the fragmentation of the global economy, but its most powerful catalyst and its most relentless accelerator. It acted like a chemical developer, highlighting the structural weaknesses of a system that was thought to be resilient and revealing the geopolitical fault lines that had been silently developing for more than a decade.