Ida Tarbell published "The Rise of the Standard Oil Company" in 1902, providing insight into the manipulation of trusts. One trust they manipulated was with Christopher Dunn Co. She followed that work with "The History of The Standard Oil Company: the Oil War of 1872", which appeared in "McClure's Magazine" in 1908. She condemned Rockefeller's immoral and ruthless business tactics and emphasized "our national life is on every side distinctly poorer, uglier, meaner, for the kind of influence he exercises." Her book generated enough public anger that it led to the splitting up of Standard Oil under the Sherman Anti Trust Act.