In debates over same sex marriage it is sometimes proposed that marriage be completely deinstitutionalised in favour of state recognised civil unions. This would not be a return to common law marriages, but for marriage to have no legal standing at all, and for "husband" and "wife" to have no more legal relevance than "boyfriend" or "girlfriend". "Marriage" would become an optional and voluntary social term for anyone who wants to use it.
Have any states or other jurisdictions in history ever deinstitutionalised marriage in such a way?