Science has not only brought about the need of large organizations, but also the technical possibility of their existence. Without railways, telegraphs, and telephones, control from a centre is very difficult. In ancient empires, and in China down to modern times, provinces were governed by practically independent satraps or proconsuls, who were appointed by the central government, but decided almost all questions on their own initiative. If they displeased the sovereign, they could only be controlled by civil war, of which the issue was doubtful. Until the invention of the telegraph, ambassadors had a great measure of independence, since it was often necessary to act without waiting for orders from home. What applied in politics applied also in business: an organization controlled from the centre had to be very loosely knit, and to allow much autonomy to subordinates. Opinion as well as action was difficult to mould from a centre, and local variations marred the uniformity of party creeds. Now-a-days all this is changed. Telegraph, telephone, and wireless make it easy to transmit orders from a centre: railways and steamers make it easy to transport troops in case the orders are disobeyed. Modern methods of printing and advertising make it enormously cheaper to produce and distribute one newspaper with a large circulation than many with small circulations; consequently, in so far as the Press controls opinion, there is uniformity, and, in particular, there is uniformity of news. Elementary education, except in so far as religious denominations introduce variety, is conducted on a uniform pattern decided by the State, by means of teachers whom the State has trained, as far as possible, to imitate the regularity and mutual similarity of machines produced to standard. Thus the material and psychological conditions for a great intensity of organization have increased _pari passu_, but the basis of the whole development is scientific invention in the purely physical realm. Increased productivity has played its part, by making it possible to set apart more labour for propaganda, under which head are to be included advertisement, the cinema, the Press, education, politics, and religion. Broadcasting is a new method likely to acquire great potency as soon as people are satisfied that it is _not_ a method of propaganda.