Wilson suggests that "the early Christian Church succeeded against all odds because its creed of selfishness provided its adherents with a sort of welfare state. Christians banded together, aiding each other through illness, famine, and war. The resulting biological edge, he thinks, played a part in the unexpected success of this once obscure mystery cult."
Source: Orr, H. Allen. "The God Project." Rev. of Darwin's Cathedral, by David S. Wilson. The New Yorker April 3, 2006: 80-83. Available at http://www.newyorker.com/archive/2006/04/03/060403crbo_books Verified 04/18/14