It is an honour to be asked to write a foreword for this new book by Michael McMillan. I have been excited about this book ever since I read early drafts of its first two chapters some time ago at the birth of the project. At different times thereafter I have read other parts and my consistent impression has been that this is an author who has both a sophisticated academic understanding of the material and a great skill in communicating that widely. Those two qualities do not often go together

The book is about change. After a...