Youssef is a French-Moroccan essayist, historian of ideas, and lecturer. His work focuses on international power dynamics, the transition from unipolarity to multipolarity, and the ideological foundations of global order. His analyses combine geopolitics, intellectual history, and civilizational perspectives, with particular attention to Western hegemony, U.S. foreign policy, and the role of ideology in international relations.
He has published several essays examining the historical roots of modern political ideologies, the relationship between religion and power, and the structural transformations of the contemporary international system. He is especially known for his critique of liberal universalism and for advocating a realist and non-Western centric understanding of multipolarity.