Honestly, I know people have strong anti-poligamy feelings. However, IMHO, it is one of the only ways that the West can survive demographically.
Flame away.
This is not pro or against polygamy but population growth in either a human population or a herd of deer is determined by the carrying capacity of the environment, physical in the case of deer and financial in the case of humans, and the number of fertile females in the population.
Barring genetic problems, how the females are impregnated is irrelevant to population growth.
In modern society, having one man man married to ten women would seriously restrict the ability to financially support 30 children that ten women married to 10 different men could easily financially support.