Good point. The following is something I thought of before and after I replied to the comment below, but which escaped my mind when I wrote it: It depends on h

Good point. The following is something I thought of before and after I replied to the comment below, but which escaped my mind when I wrote it: It depends on how the author represents the story. If he represents it as an example of Rockefeller's leadership technique and skill, that's one thing. If the author represents it as Rockefeller's exceptional efficiency and engineering acumen, or is trying to show how relatable Rockefeller was, then the author is doing PR too.