Population Genetics
Further information: Population genetics and inbreedingThe isolationist practices of endogamy may lead to a group's extinction rather than its survival, as genetic diseases may develop that can affect a larger percentage of the population. For instance, while long serving to preserve their religion, the Samaritans' practice of endogamy threatens this community: refusal to intermarry, in conjunction with their non-acceptance of converts, has led the population of this ethnic group to decrease to fewer than one thousand.
Read more about this topic: Endogamous Group
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“It was a time of madness, the sort of mad-hysteria that always presages war. There seems to be nothing left but war—when any population in any sort of a nation gets violently angry, civilization falls down and religion forsakes its hold on the consciences of human kind in such times of public madness.”
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