But among some women, since Myers’ post, there has been a sense of relief that somebody had finally spoken out. Several women told me that women new to the movement were often warned about the intentions of certain older men, especially Shermer. Two more women agreed to go on the record, by name, with their Shermer stories. (Neither accused him of rape, and neither was in a position to corroborate Smith’s story.) These stories help flesh out a man who, whatever his progressive views on science and reason, is decidedly less evolved when it comes to women.

Yet Shermer remains a leader in freethought — arguably the leader. And in his attitudes, he is hardly an exception. Hitchens, the best-selling author of God Is Not Great, who died in 2011, wrote a notorious Vanity Fair article called “Why Women Aren’t Funny.” Richard Dawkins, another author whose books have brought atheism to the masses, has alienated many women — and men — by belittling accusations of sexism in the movement; he seems to go out of his way to antagonize feminists generally, and just this past July 29 he tweeted, “Date rape is bad. Stranger rape at knifepoint is worse. If you think that’s an endorsement of date rape, go away and learn how to think.” And Penn Jillette, the talking half of the Penn and Teller duo, famously revels in using words like “cunt.”

The reality of sexism in freethought is not limited to a few famous leaders; it has implications throughout the small but quickly growing movement. Thanks to the internet, and to popular authors like Dawkins, Hitchens, and Sam Harris, atheism has greater visibility than at any time since the 18th-century Enlightenment. Yet it is now cannibalizing itself. For the past several years, Twitter, Facebook, Reddit, and online forums have become hostile places for women who identify as feminists or express concern about widely circulated tales of sexism in the movement.