Is this unlimited power, or within modern science?

If it is unlimited I would make them intelligent. That would solve almost all the other problems.

If I am limited to what is possible selective breeding to improve the gene pool in any way possible. Stop the left wing propaganda and allow people to deal with reality.

If I am limited to what is pragmatic then segregation. Not forced, anyone can live anywhere they want but no one is forced to live with anyone they don't want to live with. Force news organizations and schools to stop their anti white propaganda. Stop affirmative action. Enforce equality within the law and government programs. Stop CPS from placing white children with black families while telling white families they have to take black children. Audit data that has been fraudulently recorded by left wing propagandists, like crime statistics and put protections in place to prevent fraud in the future. Reform academic institutions that have become corrupted by politics and ideology.