The Civil Rights Act of 1964 outlawed discrimination based on sex, religion, race, etc. This means that no segregation in public places are allowed.
Answer: The European traders brought new diseases to West Africa, for example. Smallpox and tuberculosis had a devastating impact on the populations of West Africa. ... Depopulation was not only caused by the arrival of new diseases. As the reference link notes, two-thirds of the people captured and sold into slavery were male.
People would buy votes and get who they wanted in office.