U.S. History from 1865

The episode is “The Century: America's Time - 1920-1929: Boom toBust”
The episode can be found in a single playlist for the series posted at this link:
https://www.youtube.com/playlist?list=PL3H6z037pboHR-knzU-dc9XecG8UKrZs0
The question you are to answer is: What is the central argument presented in the documentary you watched and what type of material, examples, anecdotes, and ideas were used to support that interpretation of the topic covered?