Main Street has been rightfully described as "one of the most merciless novels ever written." This portrayal of small town midwestern America in the early 20th century is indeed harsh, but it fails to capture an essential aspect of Lewis' writing. Lewis has an in-depth understanding of his subject, which makes his words not only merciless but also highly believable. He doesn't limit his criticism to provincial and petty society; he is equally clear about the shortcomings of would-be reformers like Carol Kennicott. In the novel, Carol occupies the position typically held by the heroine, yet there is little heroic about her.
Carol is from the city, educated, and interested in social issues, with a left-leaning political viewpoint compared to the inhabitants of Gopher Prairie, Minnesota. When she marries Dr Will Kennicot from that town, she doesn't fully realize its smallness due to his enthusiastic endorsements. Upon arriving, she is determined to bring it into the 20th century, spread cultural enlightenment, and change its deep-rooted attitudes. However, as each of her schemes proves to be hopelessly impractical or simply annoys the locals, she abandons it for a new enthusiasm. She is laughable, and what she attempts to change is equally absurd. For instance, there is a hilarious scene where Carol attends a meeting of the town ladies, expecting them to start a course on English literature, only to discover that by the end of the evening, they believe they know all there is to know and should know about the subject, so they can move on to a new topic the next week. Part of her problem is that she wants to fit in and be accepted while also radically changing things. But the main reason she gets nowhere is the way one new enthusiasm after another takes hold of her.
The characterisation in Main Street is excellent and is mainly intended to paint a rather bleak picture of Gopher Prairie. There is nothing gentle about this novel; it is a portrait based on real understanding and real hatred.