I'd like to see the Catholic Church bring back multiple wives as an option for men who seek marriage like back in Abraham's and the early Hebrews' days. Righteous Abraham, King David and King Solomon had multiple wives.
We know in Matthew 16:16-19, Jesus Christ gave Peter the Keys of the Kingdom of Heaven to bind and loosen on earth, and the same will be bound and loosened in Heaven. This doesn't only mean retaining and forgiving sins, and rendering and lifting the temporal punishment tied to the sin. It, also, means "by making rules and laws for the government of the Church" as stated in the commentary of Haydock Catholic Bible apropos to the aforementioned scripture. It seems the number of wives allowed for a husband by the Church is a disciplinary law, which can change by what is deemed by the Successor of Peter, but Divine Law can never change (truth can't change - God can't change), and such Divine Law is for the man to remain faithful to his wife or wives and not commit adultery and fornication with women outside of his marriage(s), along with the other moral duties of the husband towards his wife or wives.
I think multiple wives is one of the solutions to, and hedges against, feminism and a contentious wife. Women naturally compete with each other to please the central figure in their lives, which in this case would be their husband, thereby, receiving the affection & security they desire from him. If other wives are in this same husband's life, she will not disgruntle him over trivial matters or for selfish reasons (which is all too common in marriages in this post-modern world), because his favor & affection will shift towards the other wives, although he must still love and support the wife with whom he has retracted much of his favor. Also, in a group setting with other women, these same women will usually check their inner resentments, objections, and dislikes for the other women in order to get along as a cohesive group, because they know their very survival depends on it. This is an intuitive defense mechanism of normal, healthy women in any group setting containing a plurality of women.