The line that separated communist countries from free countries in europe was called “the iron curtain.”

The "Iron Curtain" was an imiginary line that separated the countries under the control of the communist Soviet Union from the Democratic countries of Western Europe. This phrase was first introduced by Winston Churchill in a commencment address. Ultimately, this imaginary line would lead to increased tensions throughout the middle of the 20th century. This was a line that was constantly referred to as countries like the United States and the members of the North Atlantic Treaty Organization tried to stop the spread of communism.

first industrial revolution - the first wave of the industrial revolution lasted from the late 1700s to the mid-1800s. it industrialized the manufacture of textiles and began the move of production from homes to factories. steam power and the cotton gin played an important role in this period.

superior technology and improved medical knowledge to foster imperialism. quinine enabled europeans

to survive tropical diseases and venture into the mosquito-infested interiors of africa and asia. the combination

of the steamboat and the telegraph enabled the western powers to increase their mobility and to quickly respond

to any situations that threatened their dominance. the rapid-fire machine gun also gave them a military advantage

and was in convincing africans and asians to accept western control. the following table summarizes the

causes of the new imperialism:

causes of new imperialism

economic military/political humanitarian/religious technological

need for markets need for military bases white man’s burden new medicine

raw materials national security spread of christianity new weapons

source of investments source of

pride—nationalism

social darwinism

(superiority of western

society)

transportation

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