Actually marriage was never between two people. The practice of only having on wife started in the late 1900s and has continued through today. Almost all early Christian men had multiple wives. While religions like islam allow a man to have four. It was not until the late 1900s that the Vatican church made it illegal to have more than one wife. Islam still allows it only on the basis of EXTREME FAIRNESS from the husband.
Before religion the idea of marriage was un existing. Humans where barbarians who slept with eachother, men were not married but had woman as PROPERTY.. Marriage was created as a unity between a man and a woman or a man and a couple woman......
And even if polygamy is illegal in the u.s the United states should respect people's religions like islam and Mormans to marry who they choose.
...they did not. You confuse marriage with stuff like someone sleeping with multiple people and even then you are pulling that out of proportion. For centuries kings and emperors have produced hundreds of bastards, but they had only one legal wive at a time and their mistresses didn't had any particular status and then I'm talking about the rich, who had the time and luxury to be pulling that off. Most poor people already had trouble enough surviving with a regular family, let alone one that consists out of multiple wives. They even had registers where they noted down who married with whom for centuries. People have been going to the whores likewise for millennia, but those are very different matters.
And early christian men lived 2000 years ago and can hardly be called relevant now. Where do you get this screwed up supposed historical facts? Heny VIII created his own church just because he wanted to ditch his wive and marry a new one while the pope was against it and this was in the 16th century. Marriage is even one of the seven holy sacraments =/
Same thing with your comments about women being property, barbarians and marriage being an idea of religion. This depends on the time, place and culture. Even before the birth of Christ there was a culture around the Black Sea where women were held in high regard. Amongst the Vikings women likewise could hold a high position and could even fight alongside the men. People already married in ancient Egypt, that's also where the rite of exchanging rings comes from and no one knows exactly when people started creating religions. Already all the way back during the days of the cavemen they had those figurines of fat women they call Venus figurines which archeologists believe is already a form of "religion" and shows that women were well thought of. There's also a huge difference between woman having a lower social status and being property. In ancient Rome slaves were property, but the woman a Roman married certainly was not.
Are you making these things up or something?
Also why doesn't the Islam and the Mormons then respect the law of the USA? It works both ways. I'm all in favor of respecting someone's culture, but that does not mean everything they bring with them has to be accepted when it conflicts with the existing society. At this point you show zero respect for the USA, the country that this people would live in, but you expect then that they respect you back? At this point you're pretty much saying that people should be allowed to marry babies and that it would be disrespectful to stop them.
Polygamy in our society would simply be a bad idea and if people want to be part of that society, then they simply will have to follow it, which many do. I know several Muslim families where only two people married.