Book excerpt: Originally published in 1991, this book covers an usually long time – from the 17th to the 20th Century – and considers the impact of internal migration and immigration (primarily in Britain) as well as emigration to North America, South Africa, New Zealand and Australia. Population movements are now recognized to be an integral part of structural change within society and this book brings together a variety of approaches. Drawing on the findings of historians, geographers and sociologists, the essays highlight areas of concern and illustrate some of the directions research on migration was taking in the early 1990s.