In the 1990s and 2000s, scholars emphasized the transformative power of international human rights and the durability of liberal global governance. Today, that optimism has faded. Human rights norms face sharper constraints, weakened institutions, and their authority challenged. We argue that rising authoritarian power—driven by more countries autocratizing, major powers gaining strength, and coordination in an emboldened bloc—poses a major challenge to the global human rights system, and that the United States’ retreat from human rights leadership is accelerating this threat. Authoritarian regimes are no longer merely resisting pressure; they are reshaping the system itself. Four strategies are driving this transformation: repression of domestic and transnational activism; refuting information and discrediting of critics; re-engineering procedures and coalitions within international organizations; and replacement of existing norms with alternative narratives that redefine human rights in illiberal terms. US disengagement amplifies each strategy by removing funding, normative leadership, and institutional backing that once raised the cost of violations and constrained authoritarian advance. Together, these developments mark a turning point. Where autocracies once played defense, liberal democracies and human rights actors are now on the defensive. If powerful authoritarian states consolidate these gains, they may emerge as models for others, attract new followers, and gravely damage liberal human rights as a global project. Yet the future is not preordained. Resilience may require liberal democracies confronting illiberal backsliding at home, and for European and other consolidated democracies to assume greater external leadership to strengthen the foundations of international human rights.