The role that the disciples played in the development of Christianity included establishment of the church such as that began by Peter.

Christianity is the worship of Jesus Christ. Development of Christianity would have started with the disciples when they become aware and believed that Jesus was the Son of God.

The Hebrew civilization most directly contributed to the development of both Christianity and Islam. Abraham was a Hebrew and had two sons Ishmael and Jacob. Islam is from Ishmael's lineage and Christianity is from Jacob's lineage.

god, jesus but oringinaly can from buddism and other religions