Complex sentence: Although the income gap between whites and blacks has narrowed, Shapiro and Oliver argue that the remarkable differences in wealth, and the impact that these differences have on housing, education, and more, challenge the notion of growing equality between races in the United States.
Split into simpler sentences: Although the income gap between whites and blacks has narrowed, Shapiro and Oliver argue that the remarkable differences in wealth, and the impact that these differences have on housing, education, and more. Both also challenge the notion of growing equality between races in the United States.