How does imperialism in africa in 1878 compare with that in 1913

"The map of ethnic boundaries suggests that the amount of ethnic groups increased in 1913 compared to 1878"

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