Warren Stanford Stone was a railway worker who rose to head the Brotherhood of Locomotive Engineers in the United States from 1903 to 1925. He was unusual as a labor leader in that he did not believe in compulsory union membership and was comfortable with "labor capitalism". He supported a radical plan in which workers in an industry would take one-third of the profits, the other thirds going to capital and the public. By the end of his tenure the Brotherhood controlled investments worth over $100 million.

The Brotherhood of Locomotive Engineers and Trainmen (BLET) is a labor union founded in Marshall, Michigan, on 8 May 1863 as the Brotherhood of the Footboard. It was the first permanent trade organization for railroad workers in the US. A year later it was renamed the Brotherhood of Locomotive Engineers. The B of LE took its present name in 2004 when it became a division of the Rail Conference of the International Brotherhood of Teamsters (IBT).