Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Why Some Men Fight

McPherson takes on an interesting subject and largely succeeds. While survey work is largely a debateable way to determine anything besides what you want to interpret, it is an interesting jumping off point that, at very least, grounds McPherson's arguments. I would have prefered more integration of what the underlaying psychologies of the sides were in making up the reasons men fought. Ultimately it seems to me they fought for many the same reasons (duty, love of country, and slavery -- be it for or against). But sometimes I was left questioning whether the letters told the whole story. In order to take a portion of letters as representative we have to assume that letters will be representative of the masses who fought in the first place. I know personally my ancestor fought for the North because he was paid to.