How did Tarbell expose Rockefeller?

Ida Tarbell exposed John D. Rockefeller through meticulous investigative journalism, particularly in her series of articles published in McClure's Magazine. She uncovered unethical practices employed by Rockefeller's Standard Oil, such as predatory pricing and monopolistic tactics that stifled competition. Her detailed research and compelling writing illuminated the negative impact of Standard Oil on small businesses and consumers, ultimately contributing to public outrage and regulatory reforms against monopolies. Tarbell's work is often credited with raising awareness about corporate ethics and the need for antitrust laws.