1945 is the date of the charter.
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.
The scientific revolution was the part of the Renaissance, and it is notable for a series of changes in society, education, and knowledge, which resulted in a string of new discoveries and new views on the world. Before the scientific revolution, the Church had the dominance over the learning, dictating who will be able to learn and what; yet, as a result of this period, knowledge and science were more available and widely distributed. Scientists had more democratic ideas about the world and society, which in the end resulted in the more humane views and laws. All of these circumstances weakened the Church and its impact on society.
The discoveries of the revolution questioned some of the preceding pieces of knowledge supported by the Church, most notably the idea that the Sun goes around the Earth. Nicolaus Copernicus was one of the first scientists who proposed heliocentric theory, and people started to realize the Earth revolves around the Sun. This idea challenged religious believes, and the Church was afraid people would lose faith and trust in God. All of this finally resulted in the loss of the Church’s complete dominance and change of some dogmas that were previously preached heavily.
While, of course, people still have faith and believe in God today, these events changed the complete sovereignty that the institution of the Church had previously, as well as some of Christianity's teachings.
The Mayflower Compact was one of the first expressions of the self-government in america
