Here you will find articles and information that I find as I enjoy my love of learning about religions. I hope that you'll not only read what I write but also share YOUR perspective!
The Old Testament does not have much to say about the practice itself, but does not forbid it, as many of the patriarchs and kings had multiple wives. The New Testament, while never *explicitly* condemns it, is nonetheless vehemently against it in tone and word. Those Christians who practice polygamy justify their practices using the Old Testament, conveniently forgetting that the New Law supercedes the Old.
A Muslim male (according to the Qu'ran) may marry up to four women provided he treats them all equally. The 'fairness' qualifier was put in there to try and discourage the practice.
Sorry, the religion teacher part of me manifested itself on the weekend when it is supposed to be hidden.