The so-called "spatial turn" has already been realized in many areas of the social sciences. However, in migration sociology, space-specific considerations have been rarely encountered so far. Therefore, at the beginning of this book, there is an engagement with the question of how this circumstance could be understood historically. Following this, a conceptual methodological proposal is made on how space-specific considerations can enrich migration sociology. This is further explained with empirical examples at the end of the book.