1920s: The Ku Klux Klan, a post-Civil War terrorist organization that works to suppress blacks with threats, property destruction, and murder, is reorganized after having been disbanded for fifty years, and begins a new campaign of lynching.

Today: The Ku Klux Klan still exists, but its violent activities are limited in favor of political activity.

1920s: Artists like Pablo Picasso and Jean Toomer create works with a distorted sense of reality, working with the new artistic principle of modernism, which rejects traditional forms.

Today: Postmodernism has rejected modernism by embracing traditional principles in an ironic way, mocking the humorless, serious "artistic" attitude of the moderns.

1920s: The radio is a new form of entertainment, allowing people to enjoy professional performances without leaving their homes.

Today: The Internet is the newest form of entertainment, allowing people to shop, do research, and download an endless supply...