Elaborating on a method he developed in his previous book, Empire, State & Building, Moe tracks the building components back to the fabricators that produced them, to the quarries and mines where the raw materials were extracted, and ultimately back to the ground. He sees the Seagram Building as an “exquisite pile of technomass, attached to perhaps less exquisite inequities in its world.”

Moe derives the term “terrestrial,” for his investigation, from French sociologist Bruno Latour, as pertaining to “all the human and nonhuman, organic and inorganic, ‘natural’ and ‘unnatural’ dynamics of entities on the surface of the planet.” The shifting of materials in the making of a building creates “environmental loads,’’ which Moe argues are being asymmetrically displaced from centers of power and wealth onto the peripheries where these materials come from. Only by understanding the expanded web of materials, their sources, waste, by-products, and toxicological impacts can we gain a true accounting of the real environmental footprint of architecture.

The Seagram Building’s “bronze” I-beams are actually brass—a combination of copper and zinc. Probably the copper was a mix of recycled and new copper, likely to have come from the Chuquicamata mine in Chile’s Atacama Desert. Here Moe finds a mining town crushed, literally, by the tailings from the open pit mine, and a history of illnesses among the workers. In tracing the production of the famous I-beams, we learn about the custom die operation, and the meticulous process of straightening and hand-polishing the extrusions to achieve the perfect “machine-age” look. In Butler, Pennsylvania, the source of the pink-tinted glass Mies specified, he details the history of the Franklin Glass factory, the pouring and casting of the glass, and the labor of polishing the unique lites. The story of the company is one of growth, obsolescence, bankruptcy, and factory closure.

Mies’s masterpiece is not emblamatic of modern standardization but is a bespoke artifact, and that comes at a high cost: it was the most expensive office building ever constructed at the time, and now Moe is calculating the environmental and social costs.

But he is not interested in vilifying or valorizing the building or its creators. He wants to completely reevaluate the way we think about architecture, the way we describe it, and the way we value it. Architecture has tremendous agency and responsibility. This book demands that we rethink the very substance of architecture and its expanded footprint so we can understand its larger impact in a “terrestrial” world.