Calvinism is a branch of Protestant Christianity that follows the teachings of John Calvin, a 16th-century theologian. It emphasizes the sovereignty of God, the authority of Scripture, and the necessity of grace through faith. Calvinists believe in the concept of predestination, which suggests that God has already chosen who will be saved and who will not. Central to Calvinism is the idea of the Five Points of Calvinism, often summarized by the acronym TULIP. These points include Total Depravity, Unconditional Election, Limited Atonement, Irresistible Grace, and Perseverance of the Saints. Calvinism has significantly influenced various Christian denominations and theological discussions.