This dissertation argues that while South Korea's developmentalist regime prior to the democracy struggles in the 1980s focused on the economic dimension of Korean social life, with the rise of civil society into the democratic era, it is the moral dimension of development that has been emphasized. I explore this project of moral development through the activities of migrant centers that have provided social, legal, and medical services to foreign migrants and acted as their main advocates since the 1990s. Based on ethnographic and archival research, this dissertation focuses on the new social and ethical landscape created by the issue of foreign workers, marriage immigrants, and multicultural families. First, I examine the problem of the h...