Sharecropping farming was introduced in the South after the Civil War in America in the Reconstruction era. The South lost the war, the states were in complete ruin with destruction. The planters in the South, who own plantation were in debt with no slaves to work in the field. Sharecropping gave the poor farmers, both white and black, to earn a living by working in the fields of planters in the South. Which somewhat helped in gaining stability in the economy of the South.
Nationalism usually does provoke violence and rebellions within nations. A great example of such a thing was the assassination of Archduke Franz Ferdinand by a Bosnian Serb due to the fact he was a major Serbian Nationalist and believe Bosnia should be apart of Serbia.
Powerful lords were the heads of feudal societies which were small and housed a number of peasants who were in debt to the feudal lord. These feudal societies were often small, about the size of Andorra, or other micro nations. These societies were often at war with each other and often hired private armies
