It wasn't about that, but the horrors of what Sinclair describes in the book forced the federal government to implement regulations. Sinclair describes men working in tank rooms with steaming, open vats at floor level. He writes that when workers fell in, they would sometimes be overlooked for days, and "all but the bones of them had gone out to the world as Durham's Pure Leaf Lard".

He describes work floors soaked in blood (both animal and human), mucus, piss, and shit, dead rats, and rat poison, all be swept into the vats and food processing machines.

It turned peoples stomachs. The outcry was so intense it forced President Theodore Roosevelt to pass the Pure Food and Drug Act and the Meat Inspection Act of 1906.

But that was not the goal of the book. Sinclair hoped to awaken people to the idea that Socialism was the only answer for the conditions described in the book.