Christianity and the Outsider

What does Christianity have to say about the salvation of the African tribesman who died before the missionaries arrived, and the "great sorrow" of the Messianic Jew who grieves for family and friends who did not or will not acknowledge his Jesus as their Messiah? C. S. Lewis said these outsiders represent the "scandal of exclusivity." Jim Geiger is a Christian insider and fully committed to the exclusivity of Christ's atonement. However, he is suggesting an expanded Christology where: - The constant speed of light in E = mc2 corroborates the constant Christ of Heb 13:8. - Special and general relativity model special and general revelation. - The Christ of general revelation represents the hope of salvation for some of Christianity's outsiders.