XII. The Stages of Christian Initiation

In that remote time, and far back in the Atlantean epoch, but even in the post-Atlantean epoch, you find that the law of “marriage among close relatives” prevails, and: that this is only gradually replaced by the law of “marriage among non-relatives” In remote epochs people married within closely related groups, within small tribes. In every nation you will find that it was once considered unusual and wrong to marry someone who belonged to another tribe one's own, and this was everywhere considered an exceptional event.