I don't know too much about the commerce commission but the sherman antitrust act was created due to bad trusts abusing their powers of having national power over a certain product and therefore holding a monopoly and a sort of dictatorship in a certain field. The sherman antitrust act was the first time the government officially intervened with private businesses and laborers. Pretty much the trusts overworked workers and skyrocketed prices and people complained. I'm blanking on the word for when "the government doesn't interfere with private businesses" but the government finally interfered with this act.
The 1920s and 1950s are similar in the sense that a new culture emerged. One similarity between these time periods is that they represent the United States emerging from a World War. World War I (1914-1919) and World War II (1939-1945) were two enormous global events that affected American society and alter what culture develops afterwards.
One common culture that developed during the 20's and 50's was consumerism. Consumerism is an social and economic idea that focuses on developing products that will interest the consumer (aka buyer). During both eras, companies began to advertise items in a manner that convinced American citizens to buy them. This rise of consumerism resulted in the increased purchase of items that people wanted, but didn't necessarily need.
Even though most Americans would fall into this category, there were some critics to this consumer culture. During the 1950's the Beatnik generation developed as an anti-conformist culture. Some of them saw capitalism and the increased consumerism in American society as negative.
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