First question: are there any democratic ("somewhat" democratic like Russia counts... Saudi Arabia or any other Islamic theocracy does not) countries where polygamy is not fully illegal the way it is in USA?
Second, real, question: if such countries exist, how do the handle polygamy policy wise?
What I mean is, are there standard laws on how inheritance works in absence of a will? What are the default rules in terms of medical treatment if multiple spouses have different opinion and patient is not capable to decide? What accounting principles govern taxes?