What was an effect of Ida writings on John D Rockefellar?

John D. Rockefeller was not influenced by the writings of Ida Tarbell. Rockefeller was a successful businessman and philanthropist, but he was not known to be a reader of Tarbell's work. Tarbell was a journalist who wrote extensively about the American oil industry, and her writings were critical of Rockefeller and his business practices. However, Rockefeller was not known to have been affected by her writings.