That all depends on whom you ask. One of the most common causes is infidelity, lack of trust, money issues and a couple getting married way to young. Most first marriages end within the first five years of marriage as a result of the couple getting married at a very young age.
The number one cause of divorce is money issues. Usually, when there are issues over money, other issues tend to be magnified, but when the money is right in a marriage, the other problems take care of themselves.
Marriage runs on the union of two persons from different brougtup ,thinking ,family back ground,education and work space,your attitude,the extend you are ready to adjust so misunderstanding can lead to divorce.
The number one check box on divorce papers seems to be "Irreconcilable Differences. " A lot of people don't take a good look into the person they are going to marry before they actually tie the knot. Others spend a few years or so together and then they don't get a long anymore so they get divorced.