Gabriel Kolko is an American historian and author. He wrote a book called “The Triumph of Conservatism: A Reinterpretation of American History, 1900-1916” and “Meat Inspection: Theory and Reality” is an article in that book. Introduced the Meat Inspection Act in Progressive Era: the main reasons why it was adopted, how it affected legislation, and how the government, especially President Roosevelt, executed the new law. Through this article, Kolko also showed his opinion on supporting “free market” and condemning “political capitalism”. The beginning of the Meat Inspection Act appears to be in 1904, after the publication of Sinclair's “The Jungle”. In reality, ordinary law had begun twenty years earlier, used to satisfy Europe's largest meat export market, but in 1865 Congress passed a law to prevent the importation of diseased cattle and pigs. Because of the disease, Europeans such as the Italians, French and English limited or banned the import of meat and turned to another supplier. Some bills have been introduced, but they have failed to garner sufficient support. In May 1884, the Bureau of Animal Industry was founded, which was doing a good job of fighting European restrictions, helping packers, but not helping domestic consumers. In March 1891, the first major meat inspection law was passed; some countries have removed bans on the import of American pork. This has also put the European packaging industry in difficulty. So they imposed more standards. The government needed to act more; most of the slaughtered meat was inspected. Some companies exploited the law, but most of them, especially large companies, agreed with the committee in 1902. In 1904, Smith, who was of great informational assistance to Sinclair, published a series of articles in The Lancet... ... half of the paper ... the worker had to wear the uniform, work with better equipment and follow the inspection steps. Although conditions improved, they were still treated badly by the owners, they were kicked out if they were sick or unable to work. Roosevelt was a progressive president, his success in the Meat Inspection Act reformed the meat industry. With Roosevelt, the economic elements were always the deciding factor, and it would have been better if he paid attention to the civilian elements. The Meat Inspection Act of 1906 was the federal government's first legislation at that time. The act made meat consumption healthier and saved numerous lives. It also made working conditions more tolerable in factories. Kolko wrote about reality, what really happened during that time and readers were able to fully understand American history, especially the Progressive Era.