I have met many people who believe that polygamy will be common in the next life. But in my view there is a mathematical problem: For every man in heaven, there would have to be at least 2 women. While it is easy for me to accept that more women will make it to heaven than men (
A particular scripture has helped me understand this conflict just a little more, though there are still many questions.
"Wherefore, my brethren, hear me, and hearken to the word of the Lord: For there shall not any man among you have save it be one wife; and concubines he shall have none;..."
"For if I will, saith the Lord of Hosts, raise up seed unto me, I will command my people; otherwise they shall hearken unto these things." (Jacob 2:27,30)
In my view, this scripture seems to imply that polygamy is wrong unless specifically commanded (required!) by the Lord, when He wishes to "raise up seed unto [Him]."