I want to know the answer to the following question:
What type of bars and walls beyond physical ones does Alexander think people are behind?
All the background I'm provided with is that "She defines it further as "a system that locks people not only behind actual bars in actual prisons, but also behind virtual bars and virtual walls", illustrating the second-class citizenship that is imposed on a disproportionate number of people of color, specifically African-Americans.". Is that enough to answer the question?
Answer: yes