For example kinship is a primary source of security and financial support for low-income families.
While with the affluent kinship is a source of emotional and psychological support and welfare.
The official reasons for splitting up are a lack of affection between couples, family interference, domestic violence and drug addiction.
But many young people cite strict social mores as a heavy burden.
On the other hand the modern classes normally strive to guarantee the equality of sexes and eliminate gender discrimination.
Tradition is mostly based on religion particularly Islam and its prescribed codes of behavior, however it contains elements that are much older.
Like an increasing number of Iranians, Mahnaz divorced after marrying young because of the pressures of a conservative society that she feels often ignores a relationship's most important ingredient: love.
Now single, she looks back with sadness on the collapse of her marriage, but bears no anger towards her parents who made the arrangements seven years ago. From the first meeting with my husband's family I had a bad feeling about it," she says.
An Iranian bride waits for her groom during a mass wedding ceremony at the country's grand hall in Iran's Interior ministry building in central Tehran August 19, 2007.
Mehrnaz Samimi writes that the Iranian government has been taken by surprise by Internet dating, as it has by so many other aspects of Iran’s increasingly sophisticated modern culture.
Iran has a dress code for women, and rules about conduct in public are strict.