Explain the connection between social dawnism and human zoo

Social Darwinism basically is the "survival of the fittest" concept.
Which means only the most well adapted of people can survive or thrive.

 And human zoos were when African Americans and native Indians were kept in zoos like animals.

So I believe the connection between the two would be that the people who kept Natives and Africans in zoos were biased, and racist and felt that they were the superior race.

That they had to show all the other races that they are on the "top of the food chain."

Social Dawnism (Darwinism) is the theory that individuals, groups, and people are subject to the same Darwinian laws of natural selection of plants and animals.

Human Zoo is in 19th-20th-and 21st century of exhibitions of humans, usually called in a so-called natural or primitive state.