In 1919, Sandburg was assigned by his editor at the "Daily News" to do a series of reports on the working classes and tensions among whites and African Americans. The impetus for these reports were race riots that had broken out in other American cities. Ultimately, major riots broke out in Chicago too, but much of Sandburg's writing on the issues before the riots caused him to be seen as having a prophetic voice. A visiting philanthropist, Joel Spingarn, who was also an official of the National Association for the Advancement of Colored People, read Sandburg's columns with interest and asked to publish them, as "The Chicago Race Riots, July, 1919".