Fausto-Sterling belongs to a vanguard of biologists and psychologists who see the nature versus nurture question as old-fashioned. “There is a better way of looking at the body and how it works in the world, and understanding the body as a socially formed entity, which it is,” she explains. Men and women may be different, but only in the same way that every individual is from the next. Or, as she has also put it, “that gender differences fall on a continuum, not into two separate buckets.”