It's not just SES. Race correlates with the SES of school peers, as well. If you go to a poor (black) school in a poor (black) neighbourhood, then your own SES

It's not just SES. Race correlates with the SES of school peers, as well. If you go to a poor (black) school in a poor (black) neighbourhood, then your own SES isn't your biggest problem. And race does correlate with peer SES, as whites (and asians, and most hispanics, and well-off blacks) flee schools once there are too many low-SES blacks. The question is - how big a problem is "white flight" / segregation. If it is seen as a huge cause of inequality, then there are ways to reduce it.