The Security Council and The General Assembly
This is a bit subjective, but it could be argued that social change had the biggest change in Southern life, since the abolition os slavery (which was inherently a social issue) led to the biggest changes.
The significance was that these allowed goods to be transported much faster than by horse. Canals allowed for things to be imported and exported much more easily.
Answer: hope this helped
America called for a repeal of the 18th amendment because prohibition promoted crime, there were concerns about lack of enforcement of the law and the loss of economic opportunity. Prohibition provided criminals a stepping stool that provided them to spread and influence crime
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