Doctor Harrison Clark designed Vault 11 as a social experiment to see if humanity would unite when forced to sacrifice one of their own annually. On the day the bombs fell, he discovered Vault-Tec’s true purpose was not preservation, but the torture of inhabitants for data on compliance. To save his family, Clark entered his own "cage," spending decades manipulating the Vault’s politics to choose who lived and who died. He became the "ghost in the machine," sacrificing his soul and neighbors to ensure the survival of his son, Thomas. The experiment only ended when the last survivors chose defiance, leaving Clark to face the wasteland with a son who rightfully hates him.