Laissez-faire economic policies. The Progressive Era lasted from the 1890s to the 1920s.
In the late 1800s during the cuban rebellion against Spain 1868-1878 over 80 per cent of Cubas exports went to the US. During this time frame much investment and purchasing of land by Americans and American Companies took place. As time passed the US and Cuba further increased economic activities making them vital to each others growing economies.
I believe the answer is interactions and ideas.
Between 1870 and 1900 Africa territories were under European states control, such as Britain, France, Germany, Portugal among others. Besides, the majority of African territories lost their sovereignty and control of natural resources. Imperial policies which favored resource exploitation and cheap labor weakened local economies. As a result, revolts started to spread by the middle of the 20th century since colonies did not want to accept the Europeans policies which ruled African territories. The African Movements for independence from European rulers took place in the 20th century. It was a slow process; but, by 1977, 54 African countries got rid of European imperial rulers. Consequently, the word they received when the Africans pushed for independence was "Africa".
