What was the Ghana empire

How did the new working class of the industrial revolution differ from the working classes of the earlier, farm based economy?

The idea of manifest destiny simply stated it was america's destiny to expand from the atlantic ocean to the pacific. the word "destiny" implies an idea that it was within our rights as a nation to expand. in a paragraph of 125+ words, explain what could be wrong with that idea.

Over time, who did the nature of slavery change in america