You know how to beat a phrase in the ground don't you? Reinforces your point? Times we live in? Last I checked, morality and religion is not 'extinct' as you allude to. I'm not sure what benchmark suddenly 'removed' religion as being a part of society. What 'era' are you speaking of? Maybe I didn't get the phone call, email, letter, or whatever telling me society has "moved on" from a specific way of thinking. I guess we've returned to some period in evolution where more's, ethics, law and order, etc. have no basis. Murder, robbery, usury, honoring terms of contracts, and numerous other examples have a basis in religious thought. A set standard by society is based on a set standard concept in religion. If we're just beings following along in some evolutionary path equal to that of other animals shouldn't the law of the jungle essentially apply? Survival of the fittest? Or is there some sort of 'order' that sets us apart?
As for just getting rid of marriage, this is what Marx advocated. He felt that marriage and the concept of family in our society are relics of religious fanaticism. He called for complete removal of these systems since it took away from what benefits the collective mind. Complete equality rather than individual groupings in categories counter to the notion of the state. I wonder if a few of you knew just how much of Marx you believed in.