It's not a proposition. It is a definition. On Western culture, a marriage is a life long pairing. It is also monogamous, in the same vein, by definition. Is i

It's not a proposition. It is a definition. On Western culture, a marriage is a life long pairing. It is also monogamous, in the same vein, by definition. Is it lifelong and monogamous in every culture? No. It is in ours, though. Is the definition being coopted for non lifelong pairings? I don't think most people marry with divorce in the horizon, so even if marriage allows for divorce, I think the public promise is still one of lifelong commitment.