Yes, you are correct. Science has only now come to the point of being a somewhat unified field because of the communications network of the scientific community and the relatively simple task of describing the physical universe.<p>Religions are much more varied than modern science because the subject matter, God, is much more difficult to access or understand than is the physical universe. Religion is a universal phenomenon because humans throughout the world have experiences of God. They then struggle to communicate this encounter with an infinitely higher reality in terms that others can understand.<p>Christianity teaches that God chose Abraham to begin a people with whom he could have a special relationship through which he could impart a better knowledge of himself than what humans could come up with on their own. After many generations, that culture was at the point in which God could enter it as one of us, and at least some of them could begin to grasp what was going on, and thus the Christian Church began.