I think it would be the eighteenth century
Answer:
-technological advance like Steam powered riverboats
-means to control disease
-they were no longer confined to the coast
<span>During the Cold War, the US did everything it could to stop the spread of Communism. It believed at that time in the 'Domino Theory' that if one country fell to Communism, all countries in the area would do so.
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Serfs, likewise might be farmers but might also be craftsmen. The difference between the two was that the peasant owned his own land, while the serf did not. The serf owed labor duties to his lord, whereas a peasant owed nothing or, more usually, owed some sort of rent.