Answer:
The role of slavery in bringing on the Civil War has been hotly debated for ... African slavery was central to the development of British North America. Although slavery ... to rely on the concept of states' sovereignty as a means of self-protection.
Explanation:
Longevity in life and a brighter future for technology
A. because that was the main goal, after the first crusade none of the other crusades managed to recapture Jerusalem again,