The following list of worker deaths in United States labor disputes captures known incidents of fatal labor-related violence in U.S. labor history, which began in the colonial era with the earliest worker demands around 1636 for better working conditions. It does not include killings of enslaved persons. According to a study in 1969, the United States has had the bloodiest and most violent labor history of any industrial nation in the world, and there have been few industries which have been immune.