Lateral pure-ness *
That is, seeing a former mixture now separated into all its various pluralistic diversities ; 'pure but equal' substances in a chemically inclusive democracy.
No, in practise, a mixture is always separated, like a population of pre-1956 American school kids, into a vertical hierarchy of pure and dirty : 'separate and unequal'.
A chemical exclusive imperial hierarchy : worthy metropolitan master and unworthy colonial subject.
* Usefully confused with Jane Addams' "lateral progress"...