Now we think of the middle class as people who are neither rich nor poor, but originally they were a distinct group. In a feudal society, there are j… - Paul Graham

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Now we think of the middle class as people who are neither rich nor poor, but originally they were a distinct group. In a feudal society, there are just two classes: a warrior aristocracy, and the serfs who work their estates. The middle class were a new, third group who lived in towns and supported themselves by manufacturing and trade.