Answer:
Northerners didn't want slavery and they had already promised to allow slavery continue in areas in which it was already established (but stopped the spread to new territories). Southerners rejected the plan because they didn't want to compromise.
Explanation:
That depends on what you consider to be resistance. Most of them stopped during the 19th century after numerous acts and policies that were widely accepted since everyone wanted to avoid bloodshed. Some would argue that it lasted until the 1920s, when the final acts of attacks were held in countries such as Utah, but this was on a really small scale.
Explanation:
North America turned to African slaves as a cheaper, more plentiful labor
Yes ( but it is called a rubix cube not rubio cube)