Answer:
The Agricultural Revolution or Neolithic Revolution caused significant changes in human society that led to the growth of civilization.
Explanation:
Agriculture obliged humans to abandon their hunter-gatherer lifestyle, which was nomadic, and led to the development of a sedentary lifestyle, because the cultivation of crops requires permanence in a specific territory.
Agriculture also generated food surpluses and divison of labor.
Civilization fully emerged when the food surpluses allowed for a high increase of population, and when these surpluses also created social stratification in which a few people: the high classes, held most of the wealth and power, while the other classes were essentially working for survival.
19th century U.S. territorial expansion and was used to justify the forced removal of Native America and other groups from their homes. The rapid expansion of the United States intensified the issue of slavery as new states were added to the Union, leading to the outbreak of the Civil War.
