On December 4, 1867, Oliver Kelley and six of his associates from the US Bureau of Agriculture founded the National Grange of the Order of Patrons of Husbandry. Within two years, Minnesota had forty Grange chapters and a state organization, and Granges were in the works in Illinois, Iowa, and Wisconsin.
The Grange was, in Kelley's mind, both a social organization and an advocacy group. He wrote newspaper articles that were increasingly critical of manufacturing and processing monopolies that fixed prices at rates unfair to farmers and of railroads with exorbitant freight rates. As its influence grew, so did the Grange's membership. By the end of 1873, there were 379 chapters in Minnesota and about 9,000 across the country, with a total membership of almost 700,000. As of 2007, the National Grange had 300,000 members from 3,600 branches in 37 states.