Discussions of rights are ubiquitous. One constantly hears things such as: "The Chinese are violating Tibetan rights," "Landlords have a right that their tenants pay their rent," "Students have a right to be graded fairly," "Animals have a right not to suffer merely to bring pleasure to humans," "Abortion violates a fetus' right to life," "We violate the rights of future generations when we pollute the water. " These statements assert that Tibetans, landlords, students, animals, fetuses, and future generations all have rights. Tibetans, landlords, students, animals, fetuses, and future...