other diseases which are known to be eradicable using 

 present techniques. Along with this work should go a 

 thorough education of all people in practical hygiene and 

 the safe treatment of waste products. The successful carry- 

 ing out of medical programmes in cooperation with the 

 populations concerned would be a strong factor towards 

 bringing all people to accept scientific government. 



Since overcrowding of people in small regions is a 

 primary cause of many troubles including war, the redis- 

 tribution of populations must be carefully considered as 

 soon as possible. Two aspects to this problem exist: one 

 is the movement of people from crowded to under-popula- 

 ted countries, which is important both for relieving stress 

 in the densely populated countries and for advancing eco- 

 nomic development in the sparsely populated ones: the 

 other is the transfer of people from large cities to small 

 towns in the same area of one country, in order to eliminate 

 the adverse psychological stresses resulting from living in 

 large population centres. It is not necessary today, in view 

 of the speed of modem communications, for people to 

 live in great concentration for effective economic activity; 

 probably cities no larger than 100,000 in population would 

 generally suffice, and these could have adequate trans- 

 port space and open areas, impossible in very large cities. 



Large-scale projects for the reclamation of the presently 

 unused lands in the whole world, and the starting of agri- 

 culture on these lands, must be organized. The enormous 

 regions of the Sahara, the Congo Jungle, the Arabian Des- 

 ert, the Amazon Basin and the Australian Desert, could 

 be opened to settlement by the use of modern techniques. 

 These would include irrigation of desert regions with desa- 

 linized water obtained from the sea (Sahara, Arabian and 

 Australian Deserts), and rain water piped from artificial 



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