Heavenly created or not, it provides such profound biological advantages to offspring that it is a superb idea.
However, do not fall into the trap of assuming that monogamy and marriage are the same thing. Because socially enforced marriage is “monogamy plus” providing far more advantages to the husband, wife and offspring than just monogamy.
Look at it biologically. “Basic reproduction” means that males have the prerogative to make offspring with as many females as possible. Females have the double prerogative to get the best sperm available, but with monogamous animals, the best provider male to help raise her offspring.
And when there are many males, these are not likely the same male.
However, socially enforced marriage offers the man the advantage of a guarantee that his DNA will go to at least *some* offspring; it offers the woman a guarantee that if she compromises on having the same sperm donor and provider male, that the provider will stay with her.
And if offers the huge advantage to their children that they will be raised on a “life success” track, instead of a more animalistic “survival” track.
However, marriage is not easy and requires two things to be successful. The first is that it *must* be socially enforced, that once married, both people must be regarded as “hands off” by other people.
And second, that the dowry, or involuntary marriage, is forbidden. These two things subvert the entire idea of marriage, such as marrying an old man to a preadolescent girl, and couples not marrying out of sexual attraction and breeding selection, but for other reasons, usually financial.
I understand.