ABSTRACT
Developments in hygiene were impossible without the microscope, which depended on the development of the glass industry. Steam power could not be utilized on a large scale without improvements in the quality and scale of iron and steel work. Early locomotives crushed the inadequate steel rails, which were the best the foundries of the day could produce. Medicine and man's control over his own body and life have been changed utterly by the discovery of anaesthetics. Civilization, in all its aspects, economic, political, cultural, religious, is of a piece integrally connected. The world is becoming mentally and culturally more similar because the better and truer is driving out the local good and the temporarily true. The root of the difficulty experienced by most people, in forming their judgement on the need for international organization, lies in a failure to make an essential distinction.
