This text examines the complex evolution of global inequality and the shifting paradigms of development studies from the post-World War II era to the present. The authors analyze how early frameworks like modernization theory and dependency theory attempted to explain the persistent economic divide between wealthy and poorer countries. Central to the discussion are modern challenges such as neoliberalism, the effectiveness of the Millennium Development Goals, and the impact of globalization on state sovereignty. The sources also highlight critical "discontents" of traditional progress, including environmental degradation, gender disparities, and the rise of anti-globalization social movements. Ultimately, the text argues that achieving true human development requires a move toward sustainability and a fundamental reduction in the structural inequalities that threaten global security.