Here's why:
* Focus on Place: The novel deeply explores the landscape and people of the Nebraska prairie, capturing the unique culture and experiences of the region.
* Local Color: Cather uses vivid descriptions of the land, weather, customs, and dialects of the pioneer settlers to paint a realistic and authentic picture of life in the region.
* Character Types: The characters are deeply rooted in their environment and are shaped by the hardships and opportunities of their time. Their lives are intertwined with the land and its challenges.
* Themes of Rural Life: The novel explores themes of hardship, resilience, hope, and the changing American West, all through the lens of a specific rural environment.
While Regionalism is the most prominent school of thought in "My Ántonia", you could also argue that the novel contains elements of:
* Naturalism: The novel's focus on the harsh realities of pioneer life, the impact of the environment on individuals, and the struggle for survival echoes naturalist themes.
* Realism: Cather's detailed portrayal of everyday life, the social dynamics of the pioneer community, and the complexities of human relationships aligns with the tenets of Realism.
However, it's important to remember that "My Ántonia" transcends simple categorization. It is a rich and complex work of art that blends elements of different schools of thought to create its unique and powerful message.