Without the influence of colonialism, would African countries be as ethnically diverse as they are today?

Most likely yes

Explanation:

Let's see all the ethnic tribes before colonization. I attached a picture of Africa before it was colonized and you could see all the different ethnic tribes there were. One of the most ethnically diverse countries was Nigeria which had 300> tribes all killing each other, and when the British came in they split it between the three largest tribes. Colonization put down all these different conflicts between the tribes, but colonization itself had a lot more negatives than positives.

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explanation:

thurgood marshall

explanation: in 1954, thurgood marshall and a team of naacp attorneys won brown v. board of education of topeka, kansas. in this landmark decision, the supreme court held that segregation in public education violated the equal protection clause of the fourteenth amendment.