My task as Editor has been a humble one, in the sense that the credit for the Case Studies belongs exclusively to the authors who wrote them. Insofar as my introductory and commentary chapters help to illuminate themes, I am glad to have had the opportunity of learns.ing from those authors. If I have been guilty of misunderstanding or wrong emphasis in construing their messages, I apologise—the best guide for readers will be to go beyond my points and into the Case Studies themselve