Answer:
Horace Kallen was a philosopher and cultural pluralist who believed that different cultures should be allowed to coexist and flourish in a society. He argued that cultural pluralism, rather than assimilation or melting pot, was a more just and equitable way of accommodating diversity in American society.
During the 1920s, there were certainly aspects of American society that reflected Kallen's vision of cultural pluralism. This was a time of significant social and cultural change, with the rise of jazz music, the Harlem Renaissance, and the flapper culture. These movements celebrated diversity and challenged traditional norms and values. Additionally, the immigration of millions of people from different parts of the world, particularly from Eastern and Southern Europe, brought a diverse array of cultures and traditions to the United States.
However, it is also true that the 1920s was a time of significant racial and ethnic tension in American society. The Ku Klux Klan experienced a resurgence during this period, and discrimination against African Americans, Asian Americans, and other minority groups was widespread. Many Americans held nativist beliefs and feared the "foreignization" of American culture.
Overall, while there were certainly elements of cultural pluralism in American society during the 1920s, it would be inaccurate to say that this was the dominant ideology. The reality is more complex, with both progressive and reactionary forces shaping American culture and society during this period.