We are all publishers today, but that did not used to be the case. Here's an overview of the history of content marketing and how got here.
This is a very thorough article discussing content marketing and how storytelling is at the core.
I really like the graph on B2B content marketing useage (articles versus enewsletters versus ebooks, etc.) and the challenges we all face in content marketing.
There are other resources here too -- so go grab these insights/charts to improve your content/story marketing.