All of this adds up to a perfectly good explanation for the bizarre gender skew in Silicon Valley. It might be a personally discomfiting one to some, but that’s not a good reason to dismiss the long history of women contributing to tech and instead turn to bad science. “It’s almost strange to have to rationally refute it, because it is just so wrong,” says tech historian Marie Hicks, a professor at the University of Wisconsin-Madison and author of the book Programmed Inequality: How Britain Discarded Women Technologists and Lost Its Edge in Computing