And you are right. You cannot build the old thing here. You cannot reconstruct the twin towers of your former life exactly as they were and expect them to stand. The fault lines are still active. The memory of the fire is still hot.

In those moments, you look down, and the ground is gone. You are standing on a thin crust of shock, and beneath that is a molten core of grief. You think: I cannot build anything here. This soil is cursed.

In our modern lexicon, the phrase is inexorably tied to September 11, 2001. It has become a proper noun, a capitalized memorial in Lower Manhattan. But long before the towers fell, “ground zero” was a term borrowed from the nuclear age—the epicenter of an atomic blast. It is a phrase born from the end of things.