skill, the "Big Three" drove many older companies out of business. Packing plants represented by the UPWA closed in large numbers. In 1968, the UPWA and AMCBW joined forces, and UPWA dissolved into the Amalgamated Meat Cutters. Presidents 1943: Lewis J. Clark 1946: Ralph Helstein Footnotes External links History of packinghouse unions in Chicago Defunct trade unions in the United States United Food and Commercial Workers Meat industry trade unions Trade unions established in 1937