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Interesting story, not sure about how plausible it actually could be, but the ideas behind it are quite plausible. The afterward was the most interesting part, Card talks about the creation of the book, and the ideas behind it, and what he feels about the way politics, religion, and other factors in our society, force people to choose sides, and that not adhering to your side's exact philosophy can many times cause you to be shunned by your own side when you're not hard line enough. it's worth reading, even if you don't read the actual book.