A philosopher produces ideas, a poet poems, a clergyman sermons, a professor compendia, and so on. A criminal produces crimes. If we look a little closer at the connection between this latter branch of production and society as a whole, we shall rid ourselves of many prejudices. The criminal produces not only crimes, but also criminal law, and with this also the professor who gives lectures on criminal law, and in addition to this the inevitable compendium in which this same professor throws his lectures onto the general market as "commodities." This brings with it augmentation of national wealth, quite apart from the personal enjoyment which—as a competent witness, Herr Professor Roscher, tells us—the manuscript of the compendium brings to the originator himself.
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