The Jim Crows make it legal for establishments to openly discriminate minorities (they are given lower quality services, worse school, worse treatment during employment process, etc).
The injustice fuel a lot of movements which often referred to as Black awakening in the 1960s that eventually resulted in the civil rights act in 1964.
America today uses some of the same technology/techniques that were founded in the gilded age. Another similarity is also that social statuses still have a big role in people’s lives.