U.S. citizenship provides many rights, but also involves many responsibilities. Thus, the decision to become a U.S. citizen through naturalization is important. In most cases, a person who wants to naturalize must first be a permanent resident. By becoming a U.S. citizen, you gain many rights that permanent residents or others do not have, including the right to vote. To be eligible for naturalization, you must first meet certain requirements set by U.S. law.