People divorce because it is the norm now. Age really doesn't matter. Some people are serious about staying married but then others may f*** it up by cheating after 30 years of marriage.
1. divorce is seen as the norm
2. cheating is almost the 'norm' which may increase the divorce rate no matter the age of marriage.
3. no life experience, change, or growth (of you, partner, or both)
***marrying incompatiable, low moral, disrespectful, unfaithful, uncommitted, unsupportive partner.***
You have to know who you are really marrying and they have to know you. Understand that people change for better or worse.