Same-sex marriage is a subject that has been heavily discussed and argued since the concept of marriage came into existence. Marriage is a relationship that most American citizens are entitled to although it is not yet a fundamental right. As of a very recent court decision, Strawser v. Strange, Civil Action No. 14-0424-CG-C1 finalized on February 9, 2015, Alabama has legalized same-sex marriage; furthermore, thirty-seven states now recognize the legality of same-sex marriage. Marriage, whether it is between a heterosexual or a homosexual couple, should be a fundamental right enjoyed by all. This thesis will explain why same-sex marriage should be a fundamental right. The research presented in this thesis will be scrutinized and thoroughly examined showing the obstacles that same-sex couples face when wanting to legally marry. The United States Constitution, the Due Process Clause, and the Equal Protection Clause will be analyzed and discussed to prove that all fifty states should allow same-sex couples to wed. Citizens view what constitutes a marriage differently depending on their upbringing and residence. This thesis will illustrate why same-sex marriage has been such a widely discussed topic, and it will investigate the influence of religion and the church. Historically, the tradition of marriage has always been between one man and one woman. By examining how the tradition of marriage is changing and using case law decisions, an argument can be formed that marriage should be a fundamental right for all people.