The demand for slave increased because Growing rice required much labor, and the demand for slave labor rose. both have something to do with money.
The answer is congress. The congress has the power to declare war and negotiate peace.
Industrialization (1800s but not sure if it was late 1800s...):
-economic development- led to more factories & factory workers
-development of railroads (especially railroads that made it easier to move, transported materials & trade) new technologies and innovations like steamships, spinning jenny, cotton gin... etc...
-people in many parts of the world started moving to the US for better opportunities
this led to people from diff parts of the world to migrate to the US (better to write about for late 1800s):
-extreme hardship
-war
-lack of economic opportunities/high unemployment
then theres new places (such as the US) where your overhear about:
-more jobs
-promise of a better life
-freedom to practice ones religion
-an overall better standard of living
The Great Migration was the relocation of more than 6 million African Americans from the rural South to the cities of the North, Midwest and West from about 1916 to 1970. Driven from their homes by unsatisfactory economic opportunities and harsh segregationist laws, many blacks headed north, where they took advantage of the need for industrial workers that first arose during the First World War. During the Great Migration, African Americans began to build a new place for themselves in public life, actively confronting racial prejudice as well as economic, political and social challenges to create a black urban culture that would exert enormous influence in the decades to come.