Golly this one sure is hard. It eliminated the need for mail to be carried via roads or rail lines, and things (and people) could be carried directly to the destination's nearest airport instead of all the way down the winding roads to it.
CHINESE Communism did not originate as a direct result of activities carried on in China by the Third International. It owed its first beginnings to Chinese students returned from Soviet Russia. Occupied with the consolidation of the Revolution and throwing the weight of its international effort toward Central Asia, Moscow did not realize the potentialities of China until 1919. Moscow then saw that China offered an almost priceless first step in the world revolution. Fomentation of Chinese turmoil would result in the destruction of the special position enjoyed by "capitalistic" states in China. From that time on Moscow was active. It worked …
C the reduction of oil drilling
