Now, it's another thing to clear every question about that:
Some people may object and say that plural marriage means having co-wives in one house, and that the disputes and enmity that may arise between co-wives will have an effect on the husband, children and others, and this is harmful and should be avoided, and the only way to prevent that is to ban plural marriage.
Response to the objection:
The response to that is that family arguments may occur even when there is only one wife, and they may not even happen when there is more than one wife, as we see in real life. Even if we assume that there may be more arguments than in a marriage to one wife, even if we accept that they may be harmful and bad, the harm is outweighed by the many good things in a plural marriage. Life is not entirely bad or entirely good, but what everyone hopes is that the good will outweigh the bad, and this principle is what applies in the permission for plural marriage.
Moreover, each wife has the right to her own, separate accommodation as prescribed in Islam. It is not permissible for the husband to force his wives to live together in one house.
If we allow men to have plural wives, why are women not allowed to have multiple husbands, why does a woman not have the right to marry more than one man?
Response to this objection:
There is no point in giving a woman the right to marry multiple husbands, rather that is beneath her dignity and she would not know the lineage of her children, because she is the one who bears the offspring, and it is not permissible for the offspring to be formed from the sperm of a number of men lest the lineage of the child be lost and no one will know who is responsible for bringing up the child; this will lead to breakdown of families, loss of ties between fathers and children, which is not permitted in Islam as it is not in the interests of the woman or of the child or of society as a whole.
Al-Mufassal fi Ahkaam al-Mar’ah, part 6, p. 290