Even without the moral implications. The way society is now, society would not function as well if men had to juggle more than one family. It would be a slow progression to more civil unrest. Although I have heard that genetically women with more absent mates tend to give birth to girls because they are easier to care for. So the gender ratio if done would then start to favor multiple wives. But I disagree with the principle (disregarding any moral implications) because with our society as it is set up now, most people could not function very well juggling more than one family. Society wouldn't collapse, as some may think, but it would cripple it at least.