There's a larger number of atheist activists who identify as male. I think that since atheism correlates with intelligence, high education and scientific knowledge, and traditionally those are traits/fields considered masculine and discouraged for women, that might have something to do with the potential lower number of atheist females - Submission is considered a virtue for feminine characteristics, and praying/worshiping fits well with submission.
Whoever fights monsters should see to it that in the process he does not become a monster. And if you gaze long enough into an abyss, the abyss will gaze back into you
