[fwdude]

And it’s closest sibling, annulment.

[rstrahan]

If you just find that you are not compatible, the prior way to get a divorce was to cry Infidelity.

Catholic purists may reject “no-fault” divorce, but it is better to quietly and civilly dissolve the marriage and go separate ways. Better for the couple, better for the kids.

[St_Thomas_Aquinas]

And it’s closest sibling, annulment.

Do you believe that invalid or "null" marriages occur?

For example, is a drunken Vegas marriage valid?

Marriage to a close relative?

The principle is valid.

The question regards particulars. What constitutes a valid marriage?

What is marriage?