Interracial marriage does not eliminate race, but in my experience as someone in an interracial marriage, it does greatly ameliorate the harms of racial divisions in society. It closes the empathy gap, allowing a large circle of people on each side learn about the unique experiences and circumstances of people in the other culture. It opens a kind of wormhole in the social graph allowing cultural knowledge and resources to flow between communities previously alien to each other. I believe the power of intermarriage really cannot be overstated as a means of bridging cultural divides.