I believe it was the division of Byzantium and the Latin West. Byzantium was the emperor of Constantinople the area around Greece and Turkey and North into Russia. Latin West was under the control of different people until dominance of the Franks in the region. Another powerful and well noted authority was the Pope. Basically...there was a the decline of Rome and different views on the Christian doctrine. (Q_Q ) That's the best way I can word it.
Two most important factors were the development of industry and industrialization, and the slave trade. People started accumulating large amounts of wealth due to these two and started investing them in businesses, both personal and by other people. This led to the development of capitalism not only in Europe, but other places too.
No he actually opposed the making of nuclear missiles everywhere including america
<span>George Catlett Marshall</span><span> was Truman's Secretary of State.</span>
WW2 would be your answer
Because of WW2, many countries that used to be colonies wanted independence after Japan was defeated
hope this helps