The ruling of Brown v Board of Education changed race relations in the USA during the 50's by having children be able to be in the same school together, but it also made many people angry and had parents protesting outside schools. So it had negative and positive affects for people, but overall ended the belief of "separate but equal" in the United States.
The New Jersey plan allowed for small states to get the same amount of representation as the big states. There would be the same amount of representatives in the government for each state so that the big states wouldn't be able to oppress and defeat the small states,
Dr. Martin Luther King Jr. was specifically speaking out against the Jim crow Laws when he made that statement in 1958.
Secondary sources draw on primary sources. They may comment on primary sources, or use the evidence from primary sources to construct an argument. Books or journal articles that analyze, critique, or synthesize a range of sources are examples of secondary sources.