"Diathesis" Quotes from Famous Books
 ... originally there was no tendency either one way or the other, some families developed from unknown causes, which, whatever they were, were neither moral nor utilitarian, the practice of brother and sister marriage. This diathesis followed the ordinary laws of descent, and eventually those families which were fortunate enough to be affected in that way exterminated ...
— Kinship Organisations and Group Marriage in Australia • Northcote W. Thomas |
