Calvinistas, or Calvinists, are followers of the theological teachings of John Calvin, a 16th-century Protestant reformer. They emphasize the sovereignty of God, the authority of Scripture, and the necessity of grace through faith for salvation. Calvinism is known for its doctrines of predestination and the belief that God has chosen certain individuals for salvation. Calvinistas often belong to various branches of the Reformed tradition, which includes denominations like the Presbyterian Church and the Reformed Church in America. Their beliefs influence worship practices, church governance, and community life, focusing on a disciplined approach to faith and a commitment to living according to biblical principles.