Originally Posted by
logroller
i don't skirt the issue, I find it to be hyperbole. Since marriage is only between two people, no standing exists for those wishing to engage in legal polygamy. Now, if a law was passed which allowed for polygamy, I must then argue I have standing (as a proponent for the People) to revoke their ability to marry multiple people. But since you asked, specifically, I shall do my best.
Marriage enjoins two people as a legal entity which enjoy special protections and legal consideration. Though other legal contracts may enjoin more than two people into obligations similar to those of marriage (eg. child rearing and shared financial interest); there are, however, certain marital privileges which would be compromised in a polygamous marriage. For example, married persons' private discussions enjoy a time-honored privilege to privacy, being deemed necessary to the inherent intimacy of the relationship. However, if a third person is present, no such privilege exists. Similarly, we see this privilege between and a person and their attorney and/or doctor-- coined privileged communication, it is one which can only exist between between two people. Though this isn't the only benefit enjoyed by married couples, taken in whole, the functional reasoning for two is necessary for a myriad of marital privileges.
In the broader context of society, we are engaged in a social contract; where certain individual freedoms are forsaken for the greater good. Indeed systems of government are derived to provide a balance between social and private interests. Balance itself connotes two. In Our system of government, we see the structured power balance of two routinely: sovereign states, balanced by a federal system; bicameral legislatures, where representatives of the populus are balanced by the Senate; we even have two Senators from each state. What is the power of two, and what conditions make it preferable to three?
Again, its providing for a balance in the simplest and most narrow construct. Where there is three or more, you have the conditions necessary for a majority to impose its will upon a minority, causing harm. To combat mob rule/ protect the minority, it becomes necessary to involve third party consideration, who, under a veil of ignorance, presumably operate without a personal interest in the outcome. To explore practices which exclude personal interests would effectively negate the very nature of that which marriage seeks to promote-- rendering it little more than a common contract.