Skilled workers have cause to believe that they profit from professional clannishness. They know that sharing the se-crets of a trade or method with outsiders risks diluting the market for the ...corresponding product or service. If too many get involved in the same kind of work, not only does supply exceed demand, but the possibility of independent invention and "modernization" increases, along with the likelihood that the parameters of the entire enterprise may shift dramatically. The changes that often accompany such unregulated activity in a field may be what we call progress - or perhaps they merely represent an aspect of the myth of progress.
