Polygamy should be legalized in the United States.

Here is my main argument: The founding fathers of the United States believe that rights were endowed by a God. It was Thomas Jefferson that wrote that rights were endowed by God in his Declaration of Independence. a. In a 1794 letter to the Massachusetts Legislature, Samuel Adams wrote, "In the supposed state of nature, all men are equally bound by the laws of nature, or to speak more properly, the laws of the Creator" b. John Adams said "Suppose a nation in some distant Region should take the Bible for their only law Book, and every member should regulate his conduct by the precepts there exhibited! Every member would be obliged in conscience, to temperance, frugality, and industry; to justice, kindness, and charity towards his fellow men; and to piety, love, and reverence toward Almighty God ... What a Utopia, what a Paradise would this region be." c. John Hancock said "Resistance to tyranny becomes the Christian and social duty of each individual. ... Continue steadfast and, with a proper sense of your dependence on God, nobly defend those rights which heaven gave, and no man ought to take from us." d. Benjamin Franklin said "Here is my Creed. I believe in one God, the Creator of the Universe. That He governs it by His Providence. That He ought to be worshiped." All these men believed in a God. That said, the Constitution doesn't directly mention the issue of marriage. But since the practice of polygamy was never condoned by the founding fathers, it is fair to say that the men were not for it. That said, to go back to my original point, the founding fathers believed that a God gave people rights. And they clearly didn't believe that God gave them the right to marry multiple women. If they did, they would have put that into the constitution. So the question is, why does my opponent believe that people have the right to marry multiple people? Is it just an opinion they have or do they really believe that this is a right endowed by God? If they do not believe that it is a right endowed by a God then all they have is their opinion on the matter. And their opinion is not a good enough reason to legalize polygamy in the United States. So from a historical/constitutional standpoint, the United States has no reason to legalize polygamy. Now lets address the issue from a moral point of view. We have to ask ourselves...is polygamy moral? I have to ask, "How does my opponent decide what is right/wrong" Well, polygamy does cause problems. It "causes problems for the young, low-status males denied wives by older, wealthy men who have hoarded all the women. And those young men create problems for everybody...Monogamous marriage reduces crime, Henrich and colleagues write, pulling together studies showing that polygynous societies create large numbers of unmarried men" (http://www.slate.com...). And polygamy also "increases the risk of heart disease by more than 4-fold" (https://www.escardio.org...). So the practice literally causes people some serious problems. Most people agree that if a practice harms a person, then the practice most likely should stop. So again, how can my opponent possibly justify this practice as moral? And if they can't say that the founding fathers supported polygamy, or if they can't prove that the constitution supported it, or if they can't prove that the practice is moral, then I argue that they really have no case to justify polygamy.