In my exploration of the issue of gay marriage, I want to examine one of the salvos in the debate over gay marriage from those who oppose it: that to expand the definition from being one man one woman to being two people of any gender sets a precedent for further definition expanding later.
"Same-sex marriage would start us down a "slippery slope" towards legalized incest, bestial marriage, polygamy and all kinds of other horrible consequences."
"A classic example of the reductio ad absurdum fallacy, it is calculated to create fear in the mind of anyone hearing the argument. It is, of course, absolutely without any merit based on experience. If the argument were true, wouldn't that have already happened in countries where forms of legalized gay marriage already exist? Wouldn't they have 'slid' towards legalized incest and bestial marriage? The reality is that a form of gay marriage has been legal in Scandinavian countries for over many years, and no such legalization has happened, nor has there been a clamor for it. It's a classic scare tactic - making the end scenario so scary and so horrible that the first step should never be taken. Such are the tactics of the fear and hatemongers.
If concern over the "slippery slope" were the real motive behind this argument, the advocate of this line of reasoning would be equally vocal about the fact that today, even as you read this, convicted murderers, child molesters, known pedophiles, drug pushers, pimps, black market arms dealers, etc., are quite free to marry, and are doing so. Where's the outrage? Of course there isn't any, and that lack of outrage betrays their real motives. This is an anti-gay issue and not a pro marriage issue."
The “emergent consensus” is the collectivized expression of an idea that moral truth is located in our instincts. Atheist thinkers like Sam Harris call this the natural endowment of “moral intuition”. Even for those advocates of gay marriage who are not atheists, the critical force of the movement comes from a worldview that assigns moral weight to a phenomenon of human opinion emergence.
Moral intuition works as a moral “calculus of instinct”: a certain confluence of altruistic instinct, sexual instinct, survival instinct, etc… that rises to the surface at any one time in the life of a person as a “way that makes sense”. This “calculus of instinct" is a “bottom up” moral system that looks to nature as its ultimate author, as nature expresses itself rising up from the well of our instincts.
Those who look to “moral intuition” do not completely trust the instinct calculus of any one particular person -- as the street postmodernist says “Who’s to say?” What they do trust is that cross of section of “a way that makes sense” that is believed by a critical mass of people at any one snap shot of time. It is the emergent consensus expressed as a snap shot of collectivized moral intuition that is esteemed as “times” – the manifest instinct wisdom of the day. With this comes a certain narrative of progress: that the unfolding wisdom of nature is the process of hitherto repressed instincts coming out from under repression. As hidden instincts come out from under repression, humans are lead into the wisdom of their accidental creation.
In order to facilitate this unfolding of hitherto repressed instincts, instincts that repress instincts must be repressed. Instincts are thus divided into A) the instincts that are seen as being able to co-exist in the realm of other instincts B) those instincts that will result in a less maximized diversity of instinct experiences. Those who value the narrative of ever unfolding instinct experience see it as an act of spreading diversity to maximize instinct experience by suppressing the “bad instincts”.
Since there are certain thoughts, expressions and behaviors that are seen as being linked to the “bad instincts”, suppressing these expressions and behaviors with the force of law and taboo is seen as necessary to promote diversity. The desire to express oneself sexually in any manner is generally considered a “good instinct”. Believing in a transcendent moral order in regard to sexuality is considered to be a belief that emanates from bad and regressive, fear based instinct.
I think that expanding the definition to include polygamy and polyandry and increased normalizing and expression of gay and bisexual behavior is ahead “ahead of what comes next”. From the perspective of those who hold to instincts as the key to moral wisdom, my opinion is a regressive opinion rising from the stinky swamp of bad, backward and bigoted instincts. But my opinion is drawn from the observing the “envelope pushing” of our sexual culture already fully underway in 2008 that is occurring as an expression of a worldview that holds that any sexual distinction that puts one expression in a hierarchy of meaning or value above another is fundamentally bigoted. This worldview has a narrative that society needs to evolve incrementally towards “superflat” sexual expression as the expungement of any significant moral distinction between one sexual behavior over another. It is from this goal of having superflat sexual expression that a society is measured according to its progress, with societies with more flattened sexual hierarchies being farther along.