This study concerns what it means to be a person and the role the law plays in bestowing the status of person. The purpose of this dissertation is to further our understanding of how courts in the U.S., and especially the U.S. Supreme Court, have defined "person" as a legal construct within Constitutional law. In order to achieve this, court decisions concerning the personhood of key entities with a claim to personhood are analyzed and compared in order to yield a more meaningful understanding of the word "person." The entities studied include slaves, corporations, fetuses, and higher-order animals. To focus the study, several theoretical dichotomies are presented that unite the scholarship of personhood as it pertains to each of these ...