American Revolutionary War :)
By a war of both of the systems
Answer:
Many trends, some had been building for decades, converged to make 1920 very distinct
Explanation:
In 1920s, on one hand there was lot of urbanism, prosperity and cultural advancemeny and on the other hand there was immense social unrest. Like there was rise of KU KLUX CLAN, navatism and religious fundamentalism. America converged on the point of tradition and innovation.
I believe it is the 1st one but may be the 2nd one.
