It didn't and it did. Just because the case happened in 1954 doesn't mean that schools ended segregation, as a matter of fact it lasted for almost a decade more, if not longer because schools would still refuse to obey. Southern communities were especially supportive of segregation, and even when the civil rights acts were implemented they still didn't support them and they didn't want to be around African-Americans only it had to be hidden. On the other hand, when a Supreme Court makes a decision it does sway people to support it. That is because there is an idea of everyone being equal in the eyes of law and the supreme court is the judge on what is lawful and what isn't based on the constitution. Since there's no greater legal act than the constitution, when the supreme court makes a decision it means that the decision fits the constitution and for many Americans the constitution is almost a holy document that guides their lives. A negative externality can be for example the rise of extremism. During the reconstruction period Ku Klux Klan rose as a negative externality of the era. During the civil acts era they grew stronger again because racist people were enraged by things like desegregation.
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A secular state is an idea pertaining to secularity, whereby a state is or purports to be officially neutral in matters of religion, supporting neither religion nor irreligion.
Miners where coming into Colorado search of silver and gold and the Cheyenne Arapaho who already lived there
During the 22nd January, 1905, Russian people held a peaceful protest in St. Petersburg to claim for their rights since they were treated as slaves due to the Tsar's social and political system. While a huge crowd was marching towards the Winter Palace, the Tsar's troops fired on the people killing hundreds of protestors. This day is remembered as "Bloody Sunday". This tragedy paved the way to many strikes, riots and political agitation by the people who continued showing their discontent. Those who engaged in protests against the Tsa's system of government were considered Communists.