My parents were not together when I was growing up. My mom married my father because she felt that was a required precursor to having children. She had me and found the marriage was unsustainable and left him when I was still a baby.
I voted that I don't believe in marriage. That may not have been the right vote because my view is that I do believe that marriage is an appropriate step for people who are able to express a desire to remain together until death, regardless of life circumstances.
In my current location (Canada) at this point in time, I don't think there is very much reason to get married, as opposed to living together, if, as a couple you intend to stay together for as long as you are better together than apart (or some other variation wherein you could envision your relationship at partners ending before death).
I once said to a friend that I saw divorce as a failure and she was surprised by that. But I do -- I see divorce as a failure to live up to marriage vows, even in circumstances where I can totally see why it makes sense to end a relationship... I just don't accept that the relationship should have been sealed with a vow to stay married until death do us part, if something else can sway a couple to part.
I try not to impose that judgmentally on couples, and to accept that people get married or don't get married for different reasons and with different intentions.
But, for me, the promise to stay together "until death" is really what distinguishes marriage from other relationships and I am quite astounded at the number of people willing to make that promise... and break that promise.
In my case, I have been engaged once before, to a partner I lived with for 7 years. We got engaged really early on in the relationship and when I accepted the marriage proposal, I really did believe I could promise to be with him till death. Then I lived with longer and got to know him better... and even though that also meant I got to love more deeply, I also saw that I was not sure that I could stay with him even in ongoing sickness and poorness. Eventually, I did leave. I don't think I would have if I had married him. I would still be trying to muddle through, seeking to have as much of my sanity intact in the difficult life circumstances he's found himself in.
Currently, I am planning to move in with my boyfriend of six years. He's not much of a believer in marriage though he does say his plan is for us to stay together for life. I plan to as well.... but I can't really say I'm sure enough about it to vow to be with him "until death do us part." We do discuss getting married and I would actually do it for practical reasons (like if he needed emergency access to my health insurance before we have lived together for a full year so that he could be my spouse for that purpose or if we wanted to live together in a different country where marital status matters more than here).
So having said all that, in a sense I am great believer in marriage. I just also believe that there is value in long-term relationships where couples will try to work through obstacles but may ultimately decide to leave before death. I believe that such relationships are really common, even among married partners. But, to me, such relationships ought to be valued and celebrated for what they are -- something different than marriage