The establishment of the Chicago Union Stockyards in 1865 marked a pivotal moment in the American meatpacking industry. This facility became a major hub for the processing and distribution of livestock, particularly pigs, revolutionizing the meat supply chain. The Stockyards played a crucial role in shaping the economy of Chicago and the broader Midwest, influencing agricultural practices and urban development.

The establishment of the Chicago Union Stockyards became a focal point in literary critiques of industrial labor, as seen in Upton Sinclair's 'The Jungle.' This work and others highlighted the harsh realities of meatpacking, inspiring poetry that addressed social justice and worker rights.