The solution is so simple, we just have to stop forcing people of different races to live side by side in the same neighbourhood in the vague hope that one day they'll all get along. I don't understand the mindset of people like Putnam. He wants racial harmony, but he advocates for a policy that is demonstrably deleterious to racial relationships, among other things. Perhaps the fact that he's a political scientist has something to do with it. Even in the face of evidence he's going to stay firmly within his ideological framework, and minimise the facts that don't fit in his theory. I wonder if he's heard about this study that shows how preference for one's own race is a trait already expressed by 1-year-old babies, and whether it would change his mind about the "social construct" of race.