Around 1913, public relations pioneer issued his declaration of principles, which moved the profession's focus from primarily dispensing publicity to providing information.

Ivy Lee

Explanation:

According to my research, based on the information given in the question we can say that the public relations pioneer that is mentioned is Ivy Lee. He (Ivy Ledbetter Lee) was a publicity expert and is mostly known for his public relations and other important work that he has done with the well known Rockefeller Family.  

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