On religious grounds I am very much opposed, but approaching the issue for a non Christian I am still opposed due to the fact that couples who cohabitate before marriage have a higher chance of getting a divorce if they get married. That's not my opinion that is backed up by a fair amount of research.
However, that research has been primarily conducted in the US, and would not necessarily translate over into places with different cultural norms.
Even if your sociological informations are true (which I find dubious, but I don't have counter-informations to show), it could just mean that people that don't cohabit before marriage are more likely not to divorce even if they are married to abusive, alcoholic, violent partners. Divorce rate is not an index of marital happiness.
Actually, no matter how "dubious" this might sound to some people,
Michael Chris is absolutely right - at least that's what I understand. (And he's also right, as far as I know, that most of this research involved only couples in the U.S.)
I think there's been more than one study, but the one I've heard of most often was done in 1995 and then repeated several years later by a University of Denver researcher named Scott Stanley, who's done a lot of work on risk factors for divorce. You can find a bunch of hits about it by googling his name + divorce, but here's one of the many articles I found:
http://www.smartmarriages.com/7.html. And here's Stanley's faculty listing:
https://portfolio.du.edu/pc/port?portfolio=sstanley
The reason postulated by researchers is that living together before marriage (in some cases) indicates a lack of commitment to marriage. That is, it's not necessarily a lack of commitment to the other person but to the concept of marriage itself.
The same study also showed, however, that unmarried couples who live together but who have already made a commitment to marry (that is, they are engaged or otherwise very committed to each other) have a divorce rate that is virtually identical to couples who didn't live together before marriage. So it's the level of commitment to marriage that seems to matter, not so much the living together.
As for my own views on living together before marriage, I think it can be a good thing...or a really bad thing. It really depends on why you're living together. If you go into it with a serious commitment and with the serious intention of figuring out how to make a life together work, you might find out some important things. If you don't...well, let's just say that the results are often extremely...mixed.
Many of you who so blithely assume that of
course you should live together before marriage are, I am sorry to tell you, making a very serious error in reasoning. You're assuming that living together as an unmarried couple will be a good indicator of what it would be like to live together as a married couple.
And you know, it's very often not. Hence those divorce statistics, I would guess.
Sure, you can find out if somebody snores, and you can find out if he or she is a pig or a neat-freak, and you can maybe find out how he or she handles money. You can find out some useful stuff. But you won't know what it's really like to live with someone, as in commit to a life together, until you commit to a life together.
And besides, when two people have no legal ties holding them together, they don't always act the same as they do once they're married. Some might be a lot more careful and considerate before they're married than they are after. Some might be more jealous and possessive before they are married. Some will be exactly the same.
I know a lot of you won't believe me, but I'm going to say this anyway: You won't know what it's like to be married to somebody until you're actually married to that person. Marriage may only be "a piece of paper," as I've heard it described by some, but that's a pretty damn important piece of paper. Trust me.
As for the questions:
i: Born and raised in Southern California; moved to the Midwest after college (a long time ago now).
ii: Religious. I serve on the governing body of my church, which is part of the Presbyterian Church USA.
iii: I've been married twice. The first time was briefly in my 20s, but my current (and final

) husband and I have been married for more than 22 years, and we dated/lived together for nearly five years before that.