Predestinarianism is a theological doctrine that believes in the concept of predestination. This term refers to the belief that all events, including human lives, are predetermined by God. Some alternatives for predestinarianism include Calvinism, deterministic theology, fatalism, and preordination. Calvinism, named after John Calvin, is a branch of Protestantism that emphasizes predestination. Deterministic theology states that everything is predetermined, and free will is an illusion. Fatalism is the philosophical belief that everything is predetermined, and nothing can be done to change it. Preordination, like predestinarianism, asserts that God predetermined everything. These synonyms can be used interchangeably, depending on the context.