'Most collections which deal with issues of this sort bring together a variety of more or less persuasive arguments. This collection, in contrast, will provide people with the means of making much better arguments about the subject. For it brings together in one volume the widest possible range of thinking about these issues. I learned a great deal from reading this volume and so will, I believe, almost everyone else interested in these issues, including those who already possess considerable expertise on the subject … Whatever your interest, whether it is to understand how different people approach boundary controversies or to figure out how to improve one's understanding of them, this collection has something to teach you.' Bernard Yack, University of Wisconsin-Madison