For three decades, the right to privacy has served as a constitutional limit on governmental power. Despite the importance of this doctrine and the attention that it has received, there is little agreement on the most basic questions of its scope and derivation. What does the right to privacy really protect? What principle underlies it? In this Article, Mr. Rubenfeld critically examines the prevailing approach to these questions, which is based on talk of fundamental rights and personhood, and then advances an alternative approach. In Rubenfeld\u27s view, privacy analysis must not look to what a law prohibits, which forms the starting point of prevailing analysis, but rather to what the law affirmatively brings about. A few legal prohib...