There is presently much debate about gay marriage in California, and the roots for the argument come from several directions. In 1967 the United States Supreme Court addressed the issue of whether marriage was a fundamental right. Granted it had to do with people of the opposite sex, but the arguments for the State of Virginia which forbade interracial marriage were primarily religious in nature.
When you think about it, 1967 was not very long ago. If you are older than 42, if your parents were from sixteen states, including Texas, Oklahoma, Missouri, Arkansas, Louisiana, Mississippi, Alabama, Tennessee, Kentucky, West Virginia, Virginia, North Carolina, Delaware, South Carolina, Georgia, or Florida, and were from different races their marriages would have been illegal. In California, interracial marriage was illegal until 1948.