This article makes the counterintuitive argument that the millennia-old approach of Jewish law to regulating surveillance, protecting communications, and governing collection and use of information offers important frameworks for protecting privacy in an age of big data and pervasive surveillance. The modern approach to privacy has not succeeded. Notions of individual “rights to be let alone” and “informational self-determination” offer little defense against rampant data collection and aggregation. The substantive promise of a “fundamental human right” of privacy has largely been reduced to illusory procedural safeguards of “notice” and “consent”—manipulable protections by which individuals “agree” to privacy terms with little understanding of the bargain and little power to opt out. Judaism, on the other hand, views privacy as a societal obligation and employs categorical behavioral and architectural mandates that bind all of society's members. It limits waiver of these rules and rejects both technological capacity and the related notion of “expectations” as determinants of privacy's content. It assumes the absence of anonymity and does not depend on the confidentiality of information or behavior, whether knowledge is later used or shared, or whether the privacy subject can show concrete personal harm. When certain types of sensitive information are publicly known or cannot help but be visible, Jewish law still provides rules against their use. Jewish law offers a language that can guide policy debates. It suggests a move from individual control over information as the mechanism for shaping privacy's meaning and enforcement, to a regime of substantive obligations—personal and organizational—to protect privacy. It recognizes the interconnected nature of human interests and comprehends the totality of the harm that pervasive surveillance wreaks on individuals and social relations. It offers a conceptual basis for extending traditional privacy protections to online spaces and new data uses. And it provides a language of dignity that recognizes unequal bargaining power, rejects the aggregation and use of information to create confining personal narratives and judgments, and demands equal protection for all humans.