books.google.co.uk - Around 300 A.D. European patterns of marriage and kinship were turned on their head. What had previously been the norm - marriage to close kin - became the new taboo. The same applied to adoption, the obligation of a man to marry his brother's widow and a number of other central practices. With these...http://books.google.co.uk/books/about/The_Development_of_the_Family_and_Marria.html?id=LVkYFGqylfQC&q=patterns&utm_source=gb-gplus-shareThe Development of the Family and Marriage in Europe
