THE SIGNIFICANCE OF THE DEMAND FOR MEN
To some people it appears a shame to say that men are subject to supply and demand; to others it seems that we want to know the facts about man and the world in which he lives, just as they are, without regard to anything else whatsoever. To the latter, therefore, it seems irrelevant and idle to talk about what is consonant with, or what is hostile to man's notions of his own dignity. It will be found that men are subject to supply and demand, that the whole industrial organization is regulated by supply and demand, and that any correct comprehension of the existing industrial system must proceed from supply and demand.
After Gracchus conquered Sardinia, slaves were so abundant at Rome that "cheap as a Sardinian" passed into a proverb; Roman slavery owed its peculiar harshness and cold-heartedness to the fact that slaves were so abundant at Rome in the last century of the Republic that it did not pay to spare them. The policy in regard to slave marriage was such as to prevent their natural increase. When, later, conquest declined and slaves were fewer, their treatment became far more humane, not because Romans were less cold-hearted (they were, in fact, more so), but because slaves grew rarer and more valuable. Probably this state of things also helped to convert slaves into coloni.
Sir Henry Maine says that want and distress converted men into beasts of burden in the later days of the Carlovingians. The reason for this seems clear. It
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