The vital interdependence here indicated, cutting athwart frontiers, is largely the work of the last forty years; and it has, during that time, so developed as to have set up a financial interdependence of the capitals of the world, so complex that disturbance in New York involves financial and commercial disturbance in London, and, if sufficiently grave, compels financiers of London to co-operate with those of New York to put an end to the crisis, not as a matter of altruism, but as a matter of commercial self-protection. The complexity of modern finance makes New York dependent on London, London upon Paris, Paris upon Berlin, to a greater degree than has ever yet been the case in history. This interdependence is the result of the daily use of those contrivances of civilization which date from yesterday--the rapid post, the instantaneous dissemination of financial and commercial information by means of telegraphy, and generally the incredible increase in the rapidity of communication which has put the half-dozen chief capitals of Christendom in closer contact financially, and has rendered them more dependent the one upon the other than were the chief cities of Great Britain less than a hundred years ago. A well-known French authority, writing recently in a financial publication, makes this reflection: The very rapid development of industry has given rise to the active intervention therein of finance, which has become its _nervus rerum_, and has come to play a dominating rôle. Under the influence of finance, industry is beginning to lose its exclusively national character to take on a character more and more international. The animosity of rival nationalities seems to be in process of attenuation as the result of this increasing international solidarity. This solidarity was manifested in a striking fashion in the last industrial and monetary crisis. This crisis, which appeared in its most serious form in the United States and Germany, far from being any profit to rival nations, has been injurious to them. The nations competing with America and Germany, such as England and France, have suffered only less than the countries directly affected. It must not be forgotten that, quite apart from the financial interests involved, directly or indirectly, in the industry of other countries, every producing country is at one and the same time, as well as being a competitor and a rival, a client and a market. Financial and commercial solidarity is increasing every day at the expense of commercial and industrial competition. This was certainly one of the principal causes which a year or two ago prevented the outbreak of war between Germany and France _à propos_ of Morocco, and which led to the understanding of Algeciras. There can be no doubt, for those who have studied the question, that the influence of this