Volume 2 of The Cambridge History of Global Migrations presents an authoritative overview of the various continuities and changes in migration and globalization from the 1800s to the present day. Despite revolutionary changes in communication technologies, the growing accessibility of long-distance travel, and globalization across major economies, the rise of nation-states empowered immigration regulation and bureaucratic capacities for enforcement that curtailed migration. One major theme worldwide across the post-1800 centuries was the differentiation between “skilled” and “unskilled” workers, often considered through a racialized lens; it emerged as the primary divide between greater rights of immigration and citizenship for the former, and confinement to temporary or unauthorized migrant status for the latter. Through thirty-one chapters, this volume further evaluates the long global history of migration; and it shows that despite the increased disciplinary systems, the primacy of migration remains and continues to shape political, economic, and social landscapes around the world.

Attitudes about the healthfulness of foods are embedded in wider cultural beliefs. In the United States, except for a vegetarian counterculture, meat has generally been considered an essential part of a healthy diet. Economists have even attributed late nineteenth-century improvements in nutrition and public health largely to the greater availability of protein made possible by the technologies of mechanical refrigeration and industrial ranching. Admittedly, the feedlots and packing-houses which broadened access to meat have also produced serious public health scares, yet these have largely concerned the incidental contamination of processed meat, not its basic nature. Today, fears focus on E. coli infection and ‘mad cow’ syndrome, whereas a hundred years ago, adulteration resulted from industrial preservatives such as boracic acid or from accidents caused by low safety standards – to use Upton Sinclair's unsettling example of workers who fell into vats where ‘they would be overlooked for days, till all but the bones of them had gone out to the world as Durham's Pure Leaf Lard!’

When North American technologies were transferred to other cultures, however, they often raised more fundamental questions. For example, meat technologies transferred to Mexico at the beginning of the twentieth century generated suspicions about the healthfulness of meat and of the ways in which it was processed. Entrepreneurs from the meatpacking capital of Chicago attempted to convince the local population of the value of refrigerated meat in the first decade of the twentieth century.