This book is an introduction to the philosophy of law with an emphasis on philosophical problems in family law. It provides a survey of the classic problems discussed in most philosophy of law textbooks,for example: What is the relationship between law and morality? How should the U.S. Constitution be interpreted when deciding the constitutionality of state or federal law? What should be the aim of punishment in criminal law? Each of these questions are discussed through the lens of cases taken from U.S. family law. The book also contains chapters on issues that are exclusive to family law: How should the rules on marriage be constructed? What qualifications for marriage should be enacted and applied? What exit rules from marriage (divorce) should we adopt? What legal rights and duties should society grant to married couples? To parents? To children? Should children be allowed to sue their parents for negligent torts? Should intraspousal contracts be enforceable? What adjustments to family law suggested by feminists and contemporary legal realists should we adopt and which should we reject?