Is the Holocaust Unique? Intro

In the intro to this book of essays about the Holocaust, editor Alan Rosenbaum explains that the Holocaust has so many different opinions that it has yet to find its proper place in history.  Should the holocaust be categorized as unique or is it just another genocide?  How is the Holocaust best remembered?  And is it the worst case of genocide?  Rosenbaum poses many questions in this intro ending with "how do we respond to evil?".  The purpose of the essays in the book is to promote clarity and understanding.