Things fall apart. But in his innovative, wide-ranging, and well-illustrated book, Daniel Abramson investigates the American definition of what falling apart entails. We build new buildings partly in response to demand, but even more because we believe that existing buildings are slowly becoming obsolete and need to be replaced. Abramson shows that our idea of obsolescence is a product of our tax code, which was shaped by lobbying from building interests who benefit from the idea that buildings depreciate and need to be replaced. The belief in depreciation is not held worldwide which helps explain why preservation movements struggle more in America than elsewhere. Abramson s tour of our idea of obsolescence culminates in an assessment of recent tropes of sustainability, which struggle to cultivate the idea that the greenest building is the one that already exists."