A person who dies without a will dies intestate. Each state has a statute that specifies to whom the decedent's property is distributed if there is no will.
Many people have wanted a Roth IRA, but didn't meet the income limit guidelines. In 2010 this will no longer be an issue.
The statistics for termination of marriages in the United states are pretty grim. The latest statistics claim roughly 50% of first marriages end in divorce. Second or third marriages have only about 20% of couples remaining happily married.