From South Africa in the nineteenth century to Hong Kong today, nations around the world, including the United States, have turned to guestworker programs to manage migration. These temporary labor recruitment systems represented a state-brokered compromise between employers who wanted foreign workers and those who feared rising numbers of immigrants. Unlike immigrants, guestworkers couldn't settle, bring their families, or become citizens, and they had few rights. Indeed, instead of creating a manageable form of migration, guestworker programs created an especially vulnerable class of labor.