The 'no' campaign and most notably, ex-PM Tony Abbott argue that same-sex marriage will change the basis of traditional marriage which will in turn fundamentally change the foundations family and of our society.
Take a closer look at those foundations of marriage and family, however, and there is not much to celebrate.
Marriage (in the West) had nothing to do with love, it was historically a state-based contract to enable men to gain control and rights over women and children, to secure property, create strategic allegiances between powerful families, and to ensure reproduction of workers for the burgeoning capitalist economy.
Indeed, early laws against sodomy in Europe were not based on morality or religion, but on instead on the economics of reproduction. As Sophie Monk and Joni Pit argue, "compulsory heterosexuality is one of the techniques of bourgeois power deployed... to ensure the proletariat reproduces itself".
Second-wave feminists were critical of marriage arguing that it was the cornerstone of patriarchy, rendered women reliant on men for their livelihood, and, as Carol Pateman argued, a form of sexual servitude.
Married women have poorer health, are unhappier and do more unpaid work in the home than their unmarried counterparts.
Until fairly recently, it was legally impossible for a husband to be convicted of raping his wife because marriage was seen as contract that obliged sex to one's spouse. In Australia, rape in marriage was legal until 1994 (in the Northern Territory, though other states criminalised it earlier).
With some notable exceptions few contemporary feminists remain openly critical of marriage. Megan Tyler argues that in the current climate of 'choice feminism', being critical of the institution of marriage is construed as an attack on women's right to make individual choices. The context of these choices (patriarchal capitalism) is forgotten, ignored or decried as outdated and given over to a view that marriage can be 'reclaimed' and somehow made feminist.
But how do contemporary women fare in marriage? Well, we know that married women have poorer health, are unhappier and do more unpaid work in the home than their unmarried counterparts for a start.
In 1975 Italian Marxist feminist Silvia Federici argued that housework and childrearing was essentially unwaged labour that the capitalist system very successfully constructed as an act of love, rather than work. Today, differences between men and women's unpaid labour in the home has barely shifted with women continuing to do the majority of unpaid work in the home, even when they also work full time outside of the home.
'Traditional' marriage and family has also not been a safeinstitution for women or children, as Israeli feminist Merav Michael argued on QandA this week. Male violence against women and their children is most likely to be perpetrated by husbands (and other intimate partners) within the family home, at significantly high rates in Australia.
The notion of traditional marriage, espoused so vehemently by those in the 'no' camp then, doesn't seem like such a great institution to uphold -- it's foundations are oppressive, sexist (and racist, see for example the history of Australia's anti-miscegenation laws), and it continues to create unequal relations between heterosexual couples.
Let me be clear, I am not arguing against same-sex marriage, and I will be voting firmly 'yes' in the plebiscite. As Megan Tyler argues:
"The case for same-sex marriage, in a context where heterosexual marriage is still of significant social, political, economic, legal and religious importance, is completely understandable".
Legalising same-sex marriage challenges the entrenched notion of compulsory heterosexuality and goes some way to destabilise the patriarchal roots of marriage. Moreover, I recognise that same-sex marriage is about more than just marriage; it is also fundamentally about recognition and acceptance of non-hetero relationships.
I am arguing however, that the institution of marriage should be entirely abolished in favour of all kinds of equal romantic partnerships, including non-heteronormative ones, free of state and religious control. For ultimately, an institution that has been created for the benefit of white cis heterosexual men, can never bring liberation to anyone else.