Gilded Age was actually before this - the Gilded Age ended with the first rise of Progressivism on the national stage in the 1900s and 1910s.

The 1930s is the Great Depression - while in part caused by still-unresolved issues of capitalist fuckery inherent in the system that even early Progressives weren't interested in (or able to) resolve, it was also caused, in part, by backsliding during the 1920s caused by the election of right-wing national leaders.