Is monogamy a dying concept?

Many religions allow more than one wife. Many marriages end in painful divorces. Pornography seems to be the most popular item online, thus I think there are a lot of people fascinated with sex with another partner..lol.. Lawyers seem, as a result, to rule the world in profiting from this distress. Is there a better way and should we abandon monogamy and come up with a new concept to reflect the new reality.