

Video: In this family feud, Hanna Rosin and her daughter, Noa, debate the superiority of women with Rosin’s son, Jacob, and husband, Slate editor David Plotz

Feminists of the era did not take kindly to Ericsson and his Marlboro Man veneer. To them, the lab cowboy and his sperminator portended a dystopia of mass-produced boys. “You have to be concerned about the future of all women,” Roberta Steinbacher, a nun-turned-social-psychologist, said in a 1984 People profile of Ericsson. “There’s no question that there exists a universal preference for sons.” Steinbacher went on to complain about women becoming locked in as “second-class citizens” while men continued to dominate positions of control and influence. “I think women have to ask themselves, ‘Where does this stop?’” she said. “A lot of us wouldn’t be here right now if these practices had been in effect years ago.”

Ericsson, now 74, laughed when I read him these quotes from his old antagonist. Seldom has it been so easy to prove a dire prediction wrong. In the ’90s, when Ericsson looked into the numbers for the two dozen or so clinics that use his process, he discovered, to his surprise, that couples were requesting more girls than boys, a gap that has persisted, even though Ericsson advertises the method as more effective for producing boys. In some clinics, Ericsson has said, the ratio is now as high as 2 to 1. Polling data on American sex preference is sparse, and does not show a clear preference for girls. But the picture from the doctor’s office unambiguously does. A newer method for sperm selection, called MicroSort, is currently completing Food and Drug Administration clinical trials. The girl requests for that method run at about 75 percent.

Even more unsettling for Ericsson, it has become clear that in choosing the sex of the next generation, he is no longer the boss. “It’s the women who are driving all the decisions,” he says—a change the MicroSort spokespeople I met with also mentioned. At first, Ericsson says, women who called his clinics would apologize and shyly explain that they already had two boys. “Now they just call and [say] outright, ‘I want a girl.’ These mothers look at their lives and think their daughters will have a bright future their mother and grandmother didn’t have, brighter than their sons, even, so why wouldn’t you choose a girl?”

Why wouldn’t you choose a girl? That such a statement should be so casually uttered by an old cowboy like Ericsson—or by anyone, for that matter—is monumental. For nearly as long as civilization has existed, patriarchy—enforced through the rights of the firstborn son—has been the organizing principle, with few exceptions. Men in ancient Greece tied off their left testicle in an effort to produce male heirs; women have killed themselves (or been killed) for failing to bear sons. In her iconic 1949 book, TheSecond Sex, the French feminist Simone de Beauvoir suggested that women so detested their own “feminine condition” that they regarded their newborn daughters with irritation and disgust. Now the centuries-old preference for sons is eroding—or even reversing. “Women of our generation want daughters precisely because we like who we are,” breezes one woman in Cookie magazine. Even Ericsson, the stubborn old goat, can sigh and mark the passing of an era. “Did male dominance exist? Of course it existed. But it seems to be gone now. And the era of the firstborn son is totally gone.”