A sociologist discovered that those with the highest levels of education had the lowest exposure to people with conflicting views, while those who have not graduated from high school had the most
Freedom of speech is an important part of America, as well as most modernized nations. The entire political system in the United States requires freedom of speech.
While differing opinions in Congress might have some people rolling their eyes when nothing gets done, no one would argue that different opinions and views on things is important.
It's interesting, then, that the higher level of education someone has, the less they hear differing opinions. The people with the most diverse discussion mates are those who have not graduated from high school.
This has led some people to arguing that higher education, while boasting diversity, is actually pressures individuals to conform. 65% of the 392 top colleges surveyed maintain speech codes and other restrictions on expression that violate First Amendment principles.
A study of 24,000 students conducted by the Association of American Colleges and Universities in 2010 revealed that only 30.3% of college seniors strongly agreed with the statement that, "It is safe to hold unpopular opinions on campus."
Similarly, the number of students holding unpopular opinions in college declines steadily from freshman to senior year.
Just remember that correlation does not imply causation.