I think this short essay puts it quite well.
I am not sure of the exact evolutionary argument used in that essay, but I think there is a real sex difference in moral reasoning that needs explanation. I would say not that women are amoral but that their morality is teleological (utilitarian) rather than deontological.
A close female relative once said, in a moment of insight, that women cannot afford strict ethics because they generally have children to consider.
In any case, there are two points that seem clear to me. One is that the truly astonishing rate at which many Western women have recently descended into slutty behaviour, slovenly dress and an easy willingness to seek abortions becomes less surprising once one recognises that women do not generate their own morality internally, but rather, typically, adopt the morality of the crowd. The second point is that putting women in positions of religious authority is obviously liable to lead rapidly to the promotion of moral error. The performance of female bishops in the Anglican Communion has already shown this.
The best women are generally those who follow the norms of a patriarchal religion.
Incidentally, studies have shown a truly extraordinary correlation between a father’s religious practices and those his children eventually adopt, and very little correlation with the mother’s.