NYTimes:

That has long been one of the rallying cries of a movement, and sometimes the gist of its argument. Across decades of widespread ostracism, followed by years of patchwork acceptance and, most recently, moments of heady triumph, gay people invoked that phrase to explain why homophobia was unwarranted and discrimination senseless.

By hinging a whole movement on a conclusion that hasn’t been — and perhaps won’t be — scientifically pinpointed and proved beyond all doubt, they hitch it to a moving target. The exact dynamics through which someone winds up gay are “still an open question,” said Clinton Anderson, the director of the Lesbian, Gay, Bisexual and Transgender Concerns Office of the American Psychological Association. “There is substantial evidence of various connections between genes, brain, hormones and sexual identity,” he said. “But those do not amount to a simple picture that A leads to B.”

One landmark study looked at gay men’s brothers and found that 52 percent of identical twin brothers were also gay, in contrast with only 22 percent of nonidentical twin brothers and 11 percent of adoptive, genetically unrelated brothers. Heredity more than environment seemed to be calling the shots.

Other research has posited or identified common anatomical and chromosomal traits among gay men or lesbians, and there’s discussion of a gay gene or, rather, set of genes in the mix. The push to isolate it is entwined with the belief that establishing that sexual orientation is like skin color — an immutable matter of biology — will make homophobia as inexcusable as racism and winnow the ranks of haters.

But bigotry isn’t rational. Finding a determinative biological quirk, deviation or marker could prompt religious extremists who now want gays in reparative psychotherapy to focus on medical interventions instead. And a person’s absence of agency over his or her concentration of melanin has hardly ended all discrimination against blacks.

What’s more, the born-this-way approach carries an unintended implication that the behavior of gays and lesbians needs biological grounding to evade condemnation. Why should it?

Our laws safeguard religious freedom, and that’s not because there’s a Presbyterian, Buddhist or Mormon gene. There’s only a tradition and theology that you elect or decline to follow. But this country has deemed worshiping in a way that feels consonant with who you are to be essential to a person’s humanity. So it’s protected.

Among adults, the right to love whom you’re moved to love — and to express it through sex and maybe, yes, marriage — is surely as vital to life, liberty and the pursuit of happiness as a Glock. And it’s a lot less likely to cause injury, if that’s a deciding factor: how a person’s actions affect the community around him or her.

We don’t need to be born this way to refute the ludicrous assertion that homosexuality poses some special threat to the stability of the American family. We need only note that heterosexuality — as practiced by the likes of Newt Gingrich and John Edwards, for example — isn’t any lucky charm, and yet no one’s trying to heal the straights.