What was the purpose of Chicago's 1919 Biracial Commission as noted in the nonfiction book, The Warmth of Other Suns?

In 1919, after the city of Chicago had been devastated by two riots, a white-led, biracial commission was established to determine what the lead-up was to this unrest. The commission reported its findings and made its conclusions in a 672-page report entitled, “The Negro in Chicago.” To this day it remains the most comprehensive analysis of the early days of the Great Migration and race relations in general in northern urban areas.