Christianity is a monotheistic religion based on the life and teachings of Jesus Christ. It is one of the world's largest religions, with over 2 billion followers worldwide. Christianity teaches that Jesus is the Son of God and the savior of humanity, and that salvation is achieved through faith in him. Christianity is divided into various denominations, including Catholicism, Protestantism, and Eastern Orthodoxy, each with its own beliefs and practices. Key aspects of Christian worship include prayer, attending church services, participating in sacraments such as baptism and communion, and living according to the teachings of Jesus as found in the Bible. Scholars of Christianity study its history, theology, practices, and impact on society and culture. Research in this area may explore topics such as the historical Jesus, the development of Christian doctrine, the role of the church in social justice movements, and the relationship between Christianity and other religions.