Brilliant and at the same time brief history of what we now call Content Marketing, that in fact begins in 1880s.

Again and again we see that new fancy terminology does not necessarily mean new reality. 

https://trackmaven.com/blog/history-of-content-marketing/

A few quotes:

Content marketing practices by brands began to grow in the late 19th century, as technological advances in transportation and communications allowed companies to forge stronger connections with their customers.

With the 1920s, technological innovation led to the growing popularity of the radio. Reaching consumers’ ears became a core priority for enterprising marketers.

By early 2015, marketers faced a problem. In the rush to “do” content marketing, brands of all shapes and sizes created more content on more and more channels. The result? Many brands wasted their marketing investments churning out content on every new platform that reared its head.