The deep interest of the medical profession is directly responsible for the close association between the beginning of the sex-education movement and the diseases of immorality. At the organization meeting of the American Society of Sanitary and Moral Prophylaxis, Dr. Prince Morrow in the opening paragraph of his address said: "We have met for the purpose of discussing the wisdom and the expediency of forming a society of sanitary and moral prophylaxis. The object is to organize a social defense against a class of diseases which are most injurious to the highest interests of human society." Thus, the American Society of Sanitary and Moral Prophylaxis started as an avowed enemy of the social diseases and so it has continued to the present. The very name of its official journal, _Social Diseases_,[19] indicated the central idea of the Society. Likewise, most of the local American societies for sex-hygiene have names including such phrases as "social hygiene," "prevention of social diseases," "sanitary prophylaxis"; and only one, the Massachusetts Society for Sex Education, has a name which does not directly suggest the medical problems of sex. [Sidenote: In Europe.] In Europe, the sex-instruction movement has been concerned chiefly with spreading information concerning the social diseases. In 1902 an international congress for consideration of the venereal diseases was held in Brussels, and this congress recommended that in all countries there should be organized sanitary, social, moral, and legal societies for the prophylaxis of these diseases. As a result of this recommendation, prophylactic societies were formed in France, Germany, Italy, Holland, the United States, and other countries. Of these, the German society for the prevention of venereal disease became the strongest, with over five thousand members and twenty branch societies. [Sidenote: National societies.] The fact that the American Society of Sanitary and Moral Prophylaxis was organized by a group of people in New York City tended from the beginning to make it a local society. While for several years it took the lead in sex-hygiene and enrolled members residing in many parts of the United States, it was never a national organization. In recent years the word "American" has been omitted from its name, and its work has been limited to New York City and vicinity.[20] Many independent state and city societies were organized within a few years after the original sex-hygiene society in New York. This multiplication of societies called attention to the need of a national organization, and in 1910 the various societies were affiliated in the American Federation for Sex-Hygiene. Dr. Morrow was the leading spirit in the Federation until his death. In 1913, the Federation and the American Vigilance Association (a society especially concerned with the social evil) were united in the American Social Hygiene Association. Its offices are at 105 West 40th Street, New York City.