The Presbyterian Church in the United States of America (PCUSA) is a mainline Protestant denomination that was formed in 1983 through the merger of the United Presbyterian Church in the United States of America and the Presbyterian Church in the United States. It is known for its Reformed tradition, emphasizing the sovereignty of God, the authority of Scripture, and the necessity of grace through faith. PCUSA is governed by a system of representative democracy, where decisions are made by elected elders and ministers in a structure that includes local congregations, regional presbyteries, and national synods. The church is involved in various social justice issues and mission work, reflecting its commitment to community service and outreach.