Similarities between science fiction and dystopian fiction

Both facets of fiction depict an ultra-realistic or deeply unrealistic setting, albeit display factual elements and messages for which one living in the "real world" can relate to (author's note). Both take place in a world that could resemble the world we live in, but in an unrealistic manner. Dystopian fiction generally focuses on the location as it's science fiction-esque essence, but science fiction is more of a broader term.

EDIT: Both are used to describe a genre of fiction.

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Explanation:

the african society basically suffered the consequences of colonization and apartheid directly attacking the black people, first, during the colonialism and its main idea which which "white people" had better rights, affecting   them principally in the right to establish black people in their territories, access to quality education and health services and took away any civil right even to the black people to feel they have the same opportunities as the settlers.

may i see the historical information and the excerpt?