The Iron Heel, published in 1908, is a dystopian novel by Jack London that explores themes of class struggle, socialism, and the rise of authoritarianism. The story is framed as a historical document written by the protagonist, Avis Everhard, which is later discovered centuries into the future. The novel portrays a future United States dominated by an oppressive oligarchy, known as the "Iron Heel," and the revolutionary attempts to overthrow it.

The novel is narrated by Avis Everhard, a woman who becomes involved in the socialist movement through her husband, Ernest Everhard. Ernest is a charismatic socialist leader who advocates for workers' rights and critiques the capitalist system. He exposes the exploitation of the working class by the wealthy elite, or the "plutocrats," who control the government, industry, and the media.

As the story progresses, the oligarchy, known as the Iron Heel, consolidates power, effectively turning the United States into a corporate dictatorship. The Iron Heel suppresses labor strikes and any form of rebellion with brutal violence, using private armies, the military, and secret police to maintain control. The working class and the socialist revolutionaries attempt several uprisings, but these are crushed ruthlessly by the oligarchs.

Avis and Ernest, along with their comrades, continue to fight against the regime, but their efforts seem doomed as the Iron Heel becomes more entrenched in power. Despite their eventual defeat, the novel ends with a note of hope, suggesting that the revolution will eventually succeed, even if it takes centuries. The manuscript that Avis writes is later discovered by future generations who live in a society that has overcome the Iron Heel, indicating that the struggle for justice ultimately prevails, but only after a long and bitter fight.