Passage Map:
1: The cakewalk had roots in African American traditions.
2: The cakewalk was parodied by slaves to make fun of their owners' balls and their owners' self importance. Then European Americans parodied the dance.
3: The reason the dance was so successful was because it was a parody of a parody!
4: Walker modified the dance for middle class African Americans so that they would approve. She did the same for middle and upper class European Americans.
I wasn't able to find an overall scale. Seems like there are mini-scales in this passage:
Slaves' parody of the cakewalk vs. European Americans' parody of the cakewalk
middle-class African American view of the cakewalk and how Walker had to make it more graceful for them vs. middle/upper class European American view of the cakewalk and how Walker had to make it more authentic for them
I also didn't get a sense of what the author thought about any of this. The author seems to have written this just to give a history of the cakewalk and how Walker popularized it.