What does the destruction of the tenant farmer's house near the end of the chapter symbolize?

The destruction of the house by the bank symbolizes that corruption is overcoming righteousness and the hard work of the tenant farmers and their descendants in creating their home as they saw fit. "The iron guard bit into the house-corner, crumbled the wall, and wrenched the little house from its foundation so that it fell sideways, crushed like a bug." (page 39) The bank-owned tractor that destroyed the house represents the corrupted bank, which must continue eating profits, according the the landowners, to survive. Feeling no pity for the half-starved, poor tenant farmers, the bank monster evicted them off their homeland, leaving them with nothing.

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