Ida M. Tarbell was an American journalist, biographer, and historian. She is best known for her pioneering investigative journalism work, specifically her exposes on the Standard Oil company. Synonyms for Ida M. Tarbell include muckraker, investigative journalist, biographer, and historian. She was one of the most influential and respected journalists of her time, and her work not only exposed corruption but also helped to shape public opinion. Tarbell's legacy has continued to influence journalists and change-makers alike, inspiring them to question authority, seek truth and justice, and push for a better world.