Instruct: Classify Amazon reviews into positive or negative sentiment
Query: WHAT IF....WHO KNOWS?

I found this book interesting in part but I cannot really recommend it for this reason: It is possible to take any historical, natural or personal event and mentally change an element in the sequence of events that apparently brought it about, then write a story about how things might have worked out differently. The resultant work is not history, natural history or biography, it is pure fantasy. Historical events are so complex that even knowing that something has acutally happened, it is only with the utmost difficulty that historians attempt to explain what has happened or why. The idea that a historian sitting in an armchair could change around some causative event and then explain what the resultant events would be is sheer nonsense. No man or machine is brilliant enough to do that.