Agreed. Some of the cities shown that had low black percentages also had higher-than-average percentages of asians or hispanics. Overall, I'd say it's a combina

Agreed. Some of the cities shown that had low black percentages also had higher-than-average percentages of asians or hispanics. Overall, I'd say it's a combination of wealth factors, education/intelligence factors, and behavioral/cultural factors -- not any single one thing.