In "Main Street," Sinclair Lewis employs a writing style that combines realism with a powerful message advocating for social change. His characters and narratives reflect the struggles and inequalities tied to class, gender, and sexual orientation, challenging societal norms and conventions. Lewis's keen observations about life in small-town America reveal fundamental truths that resonate with readers, prompting them to reconsider their own values and the structure of their communities.

Through his exploration of these themes, Lewis emphasizes that social identities should not define an individual's worth or potential. He effectively communicates that all people, regardless of their background, share common human experiences and aspirations. By addressing these important issues in a relatable manner, he encourages readers to envision a more equitable society where differences are celebrated rather than marginalized.