Mid-century urban renewal cleared more than buildings. Under programs meant to modernize cities, whole neighborhoods were leveled in a few decades, and the cost of that clearance fell hardest on the people who lived there, not on the architecture. Any honest account of where some salvage came from has to name that human cost first.
The programs promised improvement: clearing what officials called blight, replacing older fabric with highways, towers, and plans drawn on a large scale. What they often delivered was the destruction of functioning communities, many of them poor and disproportionately communities of color, displaced so that their neighborhoods could be razed. The buildings were the smaller loss. The homes, the networks, the places people belonged to, those were the real casualties, and that history deserves to be named plainly rather than softened.
The architecture went too, in bulk and at speed. When a district falls in months, almost nothing is saved carefully; the machinery isn't sorting fixtures. So the losses were double, the community and its physical fabric both, and most of the material went to landfill. What little survived tended to be the exceptional, the piece someone fought for, the fixture a salvager reached before the machines. That means the salvage that traces to this period is a thin, unrepresentative remnant of what was there.
Salvage can't undo any of this, and it shouldn't pretend to. What it can do is treat the surviving pieces with the seriousness of where they came from, recognizing that an object recovered from a cleared neighborhood carries a history larger and heavier than its own restoration.