International development has remained a key part of global economic relations since the field emerged more than half a century ago. From its initial focus on colonization and state building, the field has evolved to encompass a wide range of issues, theoretical problems, and disciplinary traditions. The year 1945 is widely considered as a turning point in the study of international development. Three factors account for this: the end of World War II that left the US an economic hegemon, the ideological rivalry that defined the Cold War, and the period of decolonization that peaked around 1960 that forced development issues, including foreign aid, state building, and multilateral engagement, onto the global agenda. Since then, development paradigms have continuously evolved, adapted, and been reinvented to address the persistent and arguably widening gap between the prosperous economies of the “developed North” and the developing and frequently troubled economies of the “global South.” Today, a loosely knit holistic paradigm has emerged that recognizes the deficiencies of its predecessors, yet builds on their strengths. A holistic conception of international development embraces methodological pluralism in the scholarly study of development, while recognizing the multiple ways policy practitioners may productively apply academic theories and research findings in unique settings.