Berkley must have been pattern-matching on Atlanta, and wanted to keep black people out of white neighborhoods. That's the explicit goal of "R-1" zoning.
The original title of the zoning districts are often conveniently left out of modern discussions. In 1922, it was:
- R1 white residence district
- R2 colored residence district
- R3 undetermined race district
There's this "1922 Atlanta Zone Plan" (authored in part by the mayor of Atlanta) that outlined the R1/R2/R3 zoning paradigm that we all live with today.
Quoting from the piece[0]:
> The residence districts are further subdivided into three race districts:
> R1 or white residence district.
> R2 or colored residence district.
> R3 or undetermined race district.
> [...]
> The above race zoning is essential in the in interest of the public peace, order and security and will promote the welfare and prosperity of both the white and colored race. Care has been taken to prevent discrimination and to provide adequate space for the expansion of the housing areas of cach race without encroaching on the areas now occupied by the other.
I wrote about the entire document (and copied it in its entirety) here[1].
I hope to someday see the entire zoning paradigm (residential, commercial, industrial) struck down, for the same reasons that redlining is illegal and widely understood to be immoral.
[0] https://josh.works/full-copy-of-1922-atlanta-zone-plan#race-...
[1] https://josh.works/full-copy-of-1922-atlanta-zone-plan