I can’t think of too many places it doesn’t happen. In US schools, “tracks”. In nations, “classes” Zoos Gated communities Lack of access to travel Prisons Corporations Branding ….

I can’t think of too many places it doesn’t happen.

In US schools, “tracks”.
In nations, “classes”
Zoos
Gated communities
Lack of access to travel
Prisons
Corporations
Branding
….

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