What year did the nucleus of what became IBEW form in St. Louis?

The formation of the nucleus that eventually became the International Brotherhood of Electrical Workers (IBEW) occurred in St. Louis in 1891, which is closely related to the years provided in the options. However, 1980 is not relevant to the founding of the union, and it does not align with the historical timeline of labor organizations focused on electrical workers.

The year 1870 is too early considering the actual inception of the IBEW, while both 1900 and 1950 occur after the organization was established. The correct understanding of the historical context indicates that the IBEW was formed to advocate for the rights and needs of electrical workers, with its early meetings and group formations setting the foundation for collective bargaining and labor rights in the electrical industry. Understanding the origins of such unions is crucial for grasping the development of labor movements and their significance in shaping worker conditions and labor laws.