Subtitled "A Study of the Negro Race" and beginning with a section titled "Their Basic Savagery", "The Congo" reflects the tensions within a relatively isolated and pastoral society suddenly confronted by the industrialized world. The poem was inspired by a sermon preached in October 1913 that detailed the drowning of a missionary in the Congo River; this event had drawn worldwide criticism, as had the colonial exploitation of the Congo under the government of Leopold II of Belgium. Lindsay defended the poem; in a letter to Joel Spingarn, Chairman of the Board of Directors of the NAACP, Lindsay wrote that "My 'Congo' and 'Booker T. Washington Trilogy' have both been denounced by the Colored people for reasons that I cannot fathom... The third section of 'The Congo' is certainly as hopeful as any human being dare to be in regard to any race." Spingarn responded by acknowledging Lindsay's good intentions, but saying that Lindsay sometimes glamorized differences between people of African descent and people of other races, while many African-Americans wished to emphasize the "feelings and desires" that they held in common with others.