Answer:
Instead of coming to terms with each other in a suitable fashion, sectionalism drove each person to be "a member of their state", instead of being a "american". This led to conflicting interests, which boiled down to war. Each person went to war for reasons of their state, instead of what Lincoln wanted, the preservation of the Union.
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The main reason why this was the case is because Industrialization was an incredibly new phenomenon, and very few people could have predicted just how bad it was for the environment and for people's health.
A. <span>He ruled the anticommunist government of South Vietnam and was backed by the United States </span>