How does a simple, peaceful labor rally demanding an eight-hour workday end with a bomb blast, police firing into crowds, and the execution of men who never even threw the explosive? The Haymarket Affair of 1886 remains one of the most controversial and globally consequential events in the history of labor rights.During a rainy evening strike in Chicago, an unknown assailant threw a stick of dynamite into the ranks of advancing police officers. In the ensuing chaos and blinding smoke, police fired wildly, killing both protestors and their own men. The political establishment immediately weaponized the tragedy. Without a shred of physical evidence linking them to the bomb, eight prominent labor organizers and anarchists were subjected to a heavily biased, hysterical show trial and sentenced to death simply for their political beliefs.This rigorous historical investigation uncovers the brutal suppression of the working class. It explores the rampant xenophobia against immigrant laborers, the corrupt judicial proceedings, and the creation of May Day as a global day of worker solidarity.Unmask the machinery of political persecution. The Haymarket Affair demonstrates how swiftly governments will abandon justice to violently crush economic dissent.