Instruct: Classify Amazon reviews into positive or negative sentiment
Query: I have to change my earlier favorable review

This book convincingly made the case that guns were much less important in pre-Civil War America than usually thought. Unfortunately, the author has basically been convicted of academic fraud by Emory U, where he taught; he was forced to resign. The fraud was based on unverifiable or wrong information he presented in this book. Last week, Columbia U, which awarded him the Bancroft Prize for the book in 2001, rescinded the prize.Of course, I can no longer recommend this book. However, I believe that some of his hypotheses are interesting and I hope that other historians will research them.