In a January 7 Washington Post op-ed, author and Evergreen State family history professor Stephanie Coontz argued: “Gay marriage isn't revolutionary. It's just the next step in marriage's evolution.” In her piece, Coontz discusses the revolution in marriage that has already taken place, and argues that same-sex marriage is the next logical step:

Opponents of same-sex marriage worry that allowing two men or two women to wed would radically transform a time-honored institution. But they're way too late on that front. Marriage has already been radically transformed - in a way that makes gay marriage not only inevitable, as Vice President Biden described it in an interview late last year, but also quite logical.

We are near the end of a two-stage revolution in the social understanding and legal definition of marriage. This revolution has overturned the most traditional functions of the institution: to reinforce differences in wealth and power and to establish distinct and unequal roles for men and women under the law.

As evidence to support her hypothesis, Coontz puts current support for same-sex marriage into historical context:

Although well-financed campaigns against same-sex marriage still generate victories on Election Day, hard-core opposition has steadily eroded. In October, the Pew Research Center reported that for the first time in its 15 years of polling, less than half the public opposed same-sex marriage. That poll also found that 42 percent actively supported it - still less than a majority, but a new high. Two other national polls have found that a small majority of Americans endorse same-sex marriage.

Support for same-sex marriage is already higher than support for interracial marriage was in 1970, three years after the Supreme Court struck down anti-miscegenation laws. And since young adults ages 18 to 29 are the group most supportive of same-sex marriage, it is largely a matter of when, rather than if, a majority of Americans will endorse this extension of marriage rights.

Opponents of gay marriage argue that this trend will lead to the destruction of traditional marriage. But, for better and for worse, traditional marriage has already been destroyed, and the process began long before anyone even dreamed of legalizing same-sex marriage. People now decide for themselves who and when - and whether - to marry. When they do wed, they decide for themselves whether to have children and how to divide household tasks. If they cannot agree, they are free to leave the marriage.

If gay marriage is legally recognized in this country, it will have little impact on the institution of marriage. In fact, the growing acceptance of same-sex marriage - an indication that it's not just the president's views that are “evolving” - is a symptom, rather than a cause, of the profound revolutions in marriage that have already taken place.