This concept of Spatial Justice has overtaken me. The combining of economics, urban planning, environmental issues, transportation, food politics and social theory is amazing.
For instance, what if considered that every poorly designed building (i.e. one that did not try to minimize its environmental impact -- if we are using that metric) is actually an injustice to the world and those who do not have enough? That the building is taking away life from others? Now. It doesn't just bleed energy and cost the owner money. Now it's a baby killer.