Like the classic black-white IQ visualization says all you need to know. You can't just look at society in terms of individuals. It simply doesn't work that way. In terms of an entire country, the dynamics will be in terms of whole groups. There's a certain determinism to it.
When blacks take over a community, that gap in average IQ will be reflected over time. It cannot be prevented because it's not a centralized phenomenon. The only way to prevent it is to prevent the nigs from taking control in the first place. You can see the reverse happen with gentrification. A more intelligent/whiter population takes over a community, and their higher standards reflect. Trash gets picked up, people petition to fix roads, etc. and the place becomes livable. Then niggers want to live there, and these gentrifiers, having no understanding of race, graciously allow them in. Theeeen the place decays, the whites leave, and the cycle repeats.
