Dr.Bilal Philips, who co-authored the book “Polygamy in Islam” with Jameelah Jones, speaks about the same in this audio.
All religions allow and practice polygamy. However, polygamy in Islam is not for the desires of a man, but for the protection of rights of women. Islam is the only religion which asks man to marry only one wife if he cannot do justice. However, it also allows polygamy in order to protect the women from being misused by the society. And even that is restricted to a maximum of four.
Dr.Bilal Philips speaks about the importance of marriage in Islam and explains how it is an institution of security for the woman. He goes on to highlight the fact with statistics that the most of the people in the west are falling into illegitimate relationships. Islam on the other hand, doesn’t allow this at all. Rather it asks a man to give the all rights to a woman he wants to be with.
He further brings to light the social problems that exist today and how polygamy is the only solution to it.