However, a polygamous society would be more the 'norm' if humans weren't genetically predisposed towards jealously. Some humans feel more jealousy, than others, because of genetic differences (AKA individual personality differences)
Basically, the ideal "society" for my personality is one in which violence is, generally, perceived as a mental health problem. And as such, the majority don't tolerate violence. However, many violence apologists disagree with that definition.