I believe in a bond between a man and a woman . God never told man to marry multiple women,however, He allowed this to happen in the Bible times like King david, king solomon etc...Even abraham,God allowed him to slept with other women. Sometimes,I don't understand the ways of God in the old times,I don't really know why God allowed polygamy for his anointed men. Well in the bible time ,it's not called polygamy yet.