Polygamy

So I have been watching this show on TV about polygamy. There are people out there making it work. It has been pretty interesting to see how happy they can be as a large group. The most common is polygyny. Which is where a man takes many wives. Usually in this type a man divides his time up as equally as possible between the women. What I find most interesting is the least common form which is polyandry. Polyandry is where a woman takes many husbands, basically the reverse of polygyny. A big difference is one woman will usually marry two brothers in a family. Currently Africa is the country with the highest amount of polygamy. Currently in many different regions of the US and world there are very uneven numbers of each sex, such as there may be twice as many girls, or twice as many boys then girls. So if I do have any readers out there, what are your views on the concepts of Polygamy?