International human rights treaties, such as the Universal Declaration of Human Rights (UDHR), the International Covenant on Civil and Political Rights (ICCPR), and the International Covenant on Economic, Social and Cultural Rights (ICESCR), establish a universal framework for the protection and promotion of human rights. However, their efficacy largely depends on how these treaties are incorporated and enforced within domestic legal systems. This study examines the implementation of international human rights treaties across a diverse range of countries, focusing on the interplay between international obligations and national sovereignty. By analyzing case studies from democratic, authoritarian, and hybrid political systems, this research identifies the factors that enhance or hinder the effective domestication of human rights treaties. Findings reveal a significant disparity in treaty implementation across legal and political contexts. Democratic states with robust legal systems and active civil societies show higher levels of compliance, whereas authoritarian regimes often exploit ambiguities to evade accountability. The study also underscores the importance of grassroots advocacy and transnational cooperation in bridging the gap between treaty ratification and practical enforcement.