<span>Well I would say the qualities in human nature that explains the fact
of war was, the need for power. Most wars were started to gain land or
power.
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In 1933. the United States finally recognized the government of communist Russia, in part because the United States hoped for substantial trade with Russia. The correct option among all the options given in the question is option "A". During the time of global depression, the American companies were of the view that recognizing the country of Russia will improve the trade and hence improve the economy as well.<span />
It should be Kepler. I believe his full name is Johannes Kepler.