I read somewhere that the #1 reason for divorce is money realted.
#2 is sex related. (adultery, porn, no sex..etc.)
The number one reason is money. They say money makes the world go around. But they also say it is the root of all evil.The other top reasons for divorce:
Infidelity.
Poor communication
Change in priorities. This can be caused by having kids or due to ones job, big things.
Lack of commitment to the marriage.
Sexual problems.
Other reasons that come up frequently, but not as frequently are:
Addictions
Failed expectations of your spouse (believing one is a super hero or that he/she can fix or be everything to or for you)
Physical, emotional or sexual abuse.
http://www.associatedcontent.com/article/35097/top_reasons_people_divorce.html
http://www.articleclick.com/Article/The-Top-10-Reasons-for-Divorce/918786