Foreign Policy Magazine has put up a new web site that is GREAT.
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One of the best things they do is this "Think Again" series. They do it in their magazines, but they are now doing it more often on-line.
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They are short paragraphs about a general topic (like Counterinsurgency right now).
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The post a series of "accepted truths" or conventional wisdom, then agree or disagree with it in a short paragraph or two.
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It is cool and fun. Here is the link if you want to see it.