* Young Women: Known as "flappers," these women challenged traditional gender roles and expectations. They wore shorter dresses, bobbed their hair, smoked cigarettes, danced the Charleston, and pursued careers and education with a new sense of independence.
* African Americans: The Harlem Renaissance saw a flourishing of artistic and cultural expression among Black Americans. They challenged racial stereotypes and asserted their own identity through music, literature, art, and theatre.
* Immigrants: The influx of immigrants from Europe and other parts of the world brought new ideas, cultures, and experiences to American society, challenging traditional conceptions of American identity and values.
* Artists and Intellectuals: The Lost Generation of writers and artists, disillusioned by World War I, explored new themes and styles in literature, painting, and music, challenging traditional artistic conventions and social norms.
* Business Leaders: The economic boom of the 1920s led to a rise of new industries and business practices, such as mass production, advertising, and consumerism. This challenged traditional economic models and spurred social change.
It's important to remember that these groups weren't monolithic, and their impact varied significantly depending on their social class, race, gender, and region. However, they all contributed to a dynamic and transformative decade that challenged traditional thinking and laid the foundation for the social and cultural changes of the following decades.