The Iron Heel is a dystopian and political novel in the form of science fiction by American writer Jack London, first published in 1908.
The story proper begins with Avis Everhard, a daughter of a renowned physicist, John Cunningham, and future wife of socialist Ernest Everhard. At first, Avis Everhard does not agree with Ernest's assertion that the whole contemporary social system is based on exploitation of labour. She proceeds to investigate the conditions the workers live in, and those terrible conditions make her change her mind and accept Ernest's worldview. Similarly, Bishop Morehouse does not initially believe in the horrors described by Ernest but then becomes convinced of their truth and is confined to a madhouse because of his new views.
The story covers the years 1912 through 1932 in which the Oligarchy (or "Iron Heel") arises in the United States. Japan conquers East Asia and creates its own empire, India gains independence, and Europe becomes socialist. Canada, Mexico, and Cuba form their own Oligarchies and are aligned with the U.S. (London remains silent as to events transpiring in the rest of the world.)