Here is a three part broadcast about Antitrust laws and free market business competition in the US. Each part is about 25 minutes long. The first two parts dealt with history from the Standard Oil monopoly that started everything to the breakup of AT&T and IBM in the second half of the 20^th century. The third part deals with the current little noticed problem of the monopolistic technical platforms such as Amazon and Goggle which instead of promoting free market competition actually distort  business practice in favor of monopolistic power that benefit a small group of individual investors behind such platforms. The arguments and reasoning behind such observations are complex and subtle. But one can repeatedly listen to any portion of the broadcast to gain clarity (the graphical visual on the Internet pages are a bit not obvious on how to do this. But you can figure this out). Here is the link to the websitehttps://www.npr.org/sections/money/2019/03/20/704426033/antitrust-in-america