John Davison Rockefeller, the richest man in history. Founder of Standard Oil, revolutionized the petroleum industry and defined the structure of modern philanthropy.
Ida Tarbell, exposed Rockefeller's ruthless tactics and their destructive effect on smaller oil businesses. Tarbell's exposé fueled negative public sentiment against Standard Oil and was a contributing factor in the U.S. government's anti-trust against the Standard Oil Trust which eventually led to its breakup in 1911. Rockefeller had also put her father and brother out of business w/ his ruthless business approach.