No matter how free divorce, how frequently marriages break up, in most societies there is the assumption of permanent mating, of the idea that the marriage should last as long as both live. . . . No known society has ever invented a form of marriage strong enough to stick that did not contain the 'till death us do part' assumption.
I don't consider my marriages as failures! It's idiotic to assume that because a marriage ends, it's failed.
People are still encouraged to marry as if they could count on marriage being for life, and at the same time they are absorbing a knowledge of the great frequency of divorce.