What did the MIA encourage African Americans to do? And how long did this last? Also What stopped this boycott that MIA encouraged?

The answer is

An attractive economy.

Just think, why was it effective? -it appeled to critics because it was written well, that made it noticeable to the public including the white population-it was also recognizable to the african americans because it was about their heritage.-it was powerful just keep finding more points and elaborate on them. message me if you need more