Nothing imaginable — leftward or rightward — would constitute as radical a change in the way society is structured as this redefining of marriage for the first time in history: Not another Prohibition, not government taking over all health care, not changing all public education to private schools, not America leaving the United Nations, not rescinding the income tax and replacing it with a consumption tax. Nothing. Unless California voters amend the California Constitution or Congress amends the U.S. Constitution, four justices of the California Supreme Court will have changed American society more than any four individuals since Washington, Jefferson,...