Here’s to you, Mrs Robinson
From time to time, society rethinks what its institutions mean. Despite what fundamentalists will tell you, this may include — indeed, almost invariably does include — the institution of marriage. Previous rethinks have involved the admissibility of polygamy (mostly in non-Western societies), the marriageable status of the religious, and the precise borders of incest. Some societies admit the concept of marrying a dead person, as in France and China. The possibility of a man’s marrying the sister of a deceased wife was as energetically opposed, during most of the 19th century in Britain, as the possibility of his marrying another man is now.