believe in monogenism (descent from an original couple) because it has always been the faith of the Christian Church that there was an original Adam and Eve, and that Jesus Christ is the New Adam. As to how the effects of in-breeding were avoided, and how the genetic evidence can be squared with the teaching of monogenism, I think Drew's Multi-Germic theory explains it best (see http://whyevolutionistrue.word.....e-con\\... ), although I'd change the date. It goes like this: ...God slightly tinkered with the genes of two existing hominin pairs to ensure that the next baby they each had would have brains which were capable of interacting with a soul. These two individuals, one male and one female were Adam and Eve. God then imparted them both with many germ line cells each carrying a different genome, this allowed that each of Adam and Eve's children would not be genetic siblings so that there would be no loss of fitness due to sibling interbreeding. Each distinct gene set was based roughly on the genomes of various human-like beings that had preceded Adam and Eve, which had evolved through natural processes, but was distinct enough that it allowed for the brains of the offspring also to interact with a soul. One consequence of this modification was that it gave the F1 generation enough genetic diversity to appear as though they sprang up from a large pool of existing ancestors. It may also have been necessary that for a few generations following F1 that