In Sinclair Lewis's "Main Street," the author portrays prairie towns as failing to serve their primary purpose of supporting farmers, who are their very reason for existence. Instead of nurturing and empowering the agricultural community, these towns become exploitative, benefiting the townspeople while draining resources from farmers. Lewis argues that these towns focus on their own growth rather than reciprocating value back to the surrounding rural areas, leading to a parasitic relationship.

Furthermore, he criticizes the lack of meaningful contributions from these towns, suggesting they are unable to provide the cultural or economic advantages that larger cities offer. While capitals may exploit their surroundings, they at least provide a lasting and dignified center for the community. In contrast, the prairie towns, which Lewis describes as a "parasitic Greek civilization," fall short and only deliver a transient existence, devoid of the enrichment typically associated with civilized development.