In certain parts of Europe, it is becoming very common for couples to not get "married" but still form a nuclear family and from what I have seen, a lot of them are doing a lot better than some of my married friends.
Also, if you had spent any time in Asia, you wouldn't be singing the praises of the cultural norm of keeping the family together. Growing up, I saw a lot of cases of frequent abuse (even beatings) but the woman was supposed to keep the family together. Did you know divorce is not allowed in Philippines, please read about the impact that has. Asians in the US typically are better educated and education has more to do with lower divorce rates than an ethnicity.
edit: this is coming from a married person, in the US