Europe, Australia and America are included in the areas where polygamy is fully outlawed.

According to an article on Politico, legalising polygamy is the “most natural advance next step” in countries where it is currently outlawed.
It argues:
Given that many of us have argued, to great effect, that deference to tradition is not a legitimate reason to restrict marriage rights to groups that want them, the next step seems clear.
We should turn our efforts towards the legal recognition of marriages between more than two partners. It’s time to legalize polygamy.
However, Conor Freidersdorf argues in the Atlantic that legalising polygamy can allegedly lead to higher levels of rape, kidnapping, murder, robbery and assault.
He goes on to quote an argument that monogamy allows “more egalitarian distribution of women, which reduces male competition and social problems”.
/The Independent/
More about: #polygamy