Final answer:
Christianity originated in the eastern Mediterranean, based on Jesus Christ's life and teachings. It spread rapidly through the Roman Empire, with significant centers in places like Jerusalem and Alexandria. The proselytizing nature of Christianity, fueled by figures like St. Paul, helped in its wide distribution.
Step-by-step explanation:
The geographic hearth of Christianity is the eastern Mediterranean region, particularly the area of Palestine in the first century C.E. Originating from Judaism, Christianity considers the Jewish patriarch Abraham as its founder and is centered on the life and teachings of Jesus Christ. Followers, known as Christians, use The Bible as their central religious text. Early Christianity quickly spread through the Roman Empire, including different regions like North Africa, where Alexandria became a significant center. Jerusalem was also essential as a pilgrimage site due to its association with Jesus's crucifixion and resurrection.
Christianity's spread was significantly influenced by St. Paul, who advanced the view that Jesus's death was part of a divine plan for salvation. Despite early divisions over interpretations of Christ's teachings, Christianity established a proselytizing tradition aimed at converting others, significantly expanding its reach.