The article examines the profound transformation of the post-war system of international economic regulation triggered by geopolitical shifts and unilateral sanctions. The primary focus is the crisis of classical principles of Private International Law (PIL), such as party autonomy and mutual recognition of judgments, under the pressure of extraterritorial application of national legislation. Concurrently, the study explores the emergence of distinct legal models in the "Global South" states, based on the reception of Western law but adapted to national traditions and the imperative of protecting sovereignty. The author identifies key challenges for PIL: developing politically resilient conflict-of-law mechanisms and finding a new equilibrium between unification and legal pluralism. The conclusion posits that the future of the world order is linked to the formation of a multipolar legal space where "new" legal systems play a crucial role.