The Least Changed Aspect of America Discussion

I’m working on a communications discussion question and need an explanation and answer to help me learn.

The first 90 years of this country, from 1776-1865, many characteristics of what the country would become were already set in stone. For this discussion, instead of thinking of something that has changed, I want you to think of something that has not changed at all. What aspect of America — culture, business, economy, government, politics, media, etc — has changed the least? Give an argument as to why you think whatever aspect you chose has changed the least from the beginning of US history until today.