Post-Fosteritism is the movement in Arcology against structures that encourage or enable the racial apartheid vital to the Fosterite Empire which influenced the nascent science. Most notably, it prescribes the complete elimination of Maintenance Interstices as a sub-Arco space, and the complete racial integration of the Arco space.
Between the lines, you might notice that it doesn't mention eliminating class in design. That's where Marxist Arcology arises.
Notable Post-Fosterite Arcologies: