It would be primarily "The Church and the Crusades" that <span>played a significant role in uniting the kings and people of Europe, since adhering to religious principles back then was the norm for most. </span>
The simple answer here is because of slavery.
...Charged very high prices to move farm products to market
The farmers felt the railroads had monopoly power over them. The farmers essentially had no choice but to send their crops to market on trains. There was not much, if any, competition on most short-line tracks that went through farm areas. Therefore, most farmers had to simply accept whatever price railroads charged to transport crops. Farmers felt the railroads could gouge them by charging high prices and that they, the farmers, had no recourse when this happened. They blamed much of their trouble on this monopoly power.
Gitlow v. New York (freedom of speech)
Gideon v. Wainwright (right to a lawyer)
Explanation: Gitlow v. New York (freedom of speech) it was a decision of the United States Supreme Court, stating that the Fourth Amendment of the United States Constitution was stipulated as a First Amendment Revision protecting freedom of expression and freedom of the press to apply in the US states.
Gideon v. Wainwright (right to a lawyer) this is a case of the United States Supreme Court. In it, the Supreme Court unanimously ruled that states are required, under the Sixth Amendment to the US Constitution, to provide a lawyer to defendants in criminal cases that cannot afford their own lawyers.
C. the willing to do almost anything to keep to united states together.