Socialism, in the sense in which the word connotes a subversion of the economic foundations of modern culture, appears to be found only sporadically and uncertainly outside the limits, in time and space, of the discipline exercised by the modern mechanical, non-pecuniary occupations. This state of the case need of course not be due solely to the disciplinary effects of the industrial employments, nor even solely to effects traceable to those employments whether in the way of disciplinary results, selective development, or what not. Other factors, particularly factors of an ethnic character, seem to cooeperate to the result indicated; but, so far as evidence bearing on the point is yet in hand and has been analysed, it indicates that this differentiation of occupations is a necessary requisite to the growth of a consistent body of socialistic sentiment; and the indication is also that wherever this differentiation prevails in such a degree of accentuation and affects such considerable and compact bodies of people as to afford ground for a consistent growth of common sentiment, a result is some form of iconoclastic socialism. The differentiation may of course have a selective as well as a disciplinary effect upon the population affected, and an off-hand separation of these two modes of influence can of course not be made. In any case, the two modes of influence seem to converge to the outcome indicated; and, for the present purpose of illustration simply, the tracing out of the two strands of sequence in the case neither can nor need be undertaken. By force of this differentiation, in one way and another, the industrial classes are learning to think in terms of material cause and effect, to the neglect of prescription and conventional grounds of validity; just as, in a faintly incipient way, the economists are also learning to do in their discussion of the life of these classes. The resulting decay of the popular sense of conventional validity of course extends to other matters than the pecuniary conventions alone, with the outcome that the socialistically affected industrial classes are pretty uniformly affected with an effortless iconoclasm in other directions as well. For the discipline to which their work and habits of life subject them gives not so much a training away from the pecuniary conventions, specifically, as a positive and somewhat unmitigated training in methods of observation and inference proceeding on grounds alien to all conventional validity. But the practical experiment going on in the specialisation of discipline, in the respect contemplated, appears still to be near its beginning, and the growth of aberrant views and habits of thought due to the peculiar disciplinary trend of this late and unprecedented specialisation of occupations has not yet had time to work itself clear.