Yes.
It's not decided by culture, or religion, but by the two people involved in the marriage. Religion and culture can shape the individuals but it is not responsible for their action, they are. They make their choices.
The idea of happy marriage was added somewhere in the thread. Again happiness is an individuals choice. However, once you interact with others you start to modify your world to accomodate others, or not. That or not, may be the key to the other choosing to not remain in the marriage.
It takes two to keep a mrriage together, but only one to break it up. One person alone can not hold a relationship together.
Can someone affect others? Yes of course. How much and in what direction is highly variable. You can't help someone unless they want you to, but you can provide models that others can help but learn from. Maybe not everything is learned, but something at some level will be transferred.
It can be yours and knowledge, wisdom, observance and faith can find it for you.
You are perfection.
Iam2 
