The reflection may put us in mind of what seems to be a general law. The ultimate cause of the adoption of institutions and rules of conduct is often the fact of their utility to the race; but it is only at a later period that their utility becomes the conscious or avowed reason for maintaining them. The political fabric has been clearly built up, in great part, by purely selfish ambition. Nations have been formed by energetic rulers, who had no eye for anything beyond the gratification of their own ambition, although they were clear-headed enough to see that their own ambition could best secure its objects by taking the side of the stronger social forces, and by giving substantial benefit to others. The same holds good pre-eminently of industrial relations. We all know how Adam Smith, sharing the philosophical optimism of his time, showed how the pursuit of his own welfare by each man tended, by a kind of pre-ordained harmony, to contribute to the welfare of all. Since his time we have ceased to be so optimistic, and have recognised the fact that the building up of modern industrial systems has involved much injury to large classes. And yet we may, I think, in great measure adopt his view. The fact that each man was rogue enough to think first of himself and of his own wife and family is not a proof or a presumption that he did not flourish because, in point of fact, he was contributing (quite unintentionally perhaps) to the comforts of mankind in general. What we have to reflect is that, while the bare existence of certain institutions gives a strong presumption of their utility, there is also a probability that when the utility becomes a conscious aim or a consciously adopted criterion of their advantage, they will require a corresponding modification intended to secure the advantages at a minimum cost of evil.