Christianity, founded by Jesus in the 1st century C.E. as an offshoot of Judaism, is the world's largest religion with core beliefs centered around the life, teachings, and resurrection of Jesus Christ as the savior. It emphasizes the Holy Trinity, the importance of sacred scriptures like the Bible, and various sacraments for spiritual growth, while also displaying significant historical divisions, particularly between Roman Catholicism and Protestantism. Issues such as ecumenism, sexuality, and the sanctity of life are contemporary challenges that continue to influence Christian teachings and practices.