The quote gives the people the right to abolish the government as soon as it become destructive to the country and/or its citizens.
Answer:
Whites in the North feared competition for their jobs.
Slate is much more commonly found in wet areas, especially around rivers in the United States, so it wouldn't be very available to Natives who were more inland.
America is a 1st world country with plenty of job opportunities and better living conditions a than most other countries.
