Perhaps they saw how the big national monopolies, like Siemens and BASF and Samsung, and Sanyo and . became stultifying nepotistic monopolies in various fields, and when faster and quicker more innovative US companies came along that ran past them - and seeing this, decided to have a way to limit these monopolies. Look up Standard oil monopoly for some aspects, https://en.wikipedia.org/wiki/Standard_Oil That is the wiki and here.... https://www.investopedia.com/insights/history-of-us-monopoli...