It is time for more John Stuart Mill. 
After saying why the subjection of women was to be abhorred, and why it was a bad thing, and why it would be difficult to overcome (see earlier post somewhere), he went on to talk about the "modern, civilised" society, which had the feature that one was not born in one's place and had no chance to change status, like in the bad old days. Hence this is another injustice: if we believed in this principle, that an individual ought to be able to better his/her circumstances, then "we ought to act as if we believed it", and "not to ordain that to be born a girl instead of a boy, ... shall decide one's position all through life".
And one of my favourite quotes: "In all things of any difficulty and importance, those who can do them well are fewer than the need, even with the most unrestricted latitude of choice: and any limitation of the field of selection deprives society of some chances of being served by the competent, without ever saving it from the incompetent."
And a nice positive statement: "... nobody asks for protective duties and bounties in favour of women; it is only asked that the present bounties and protective duties in favour of men should be recalled." How about that?
And there was a lot more rather sarky comments about what men say they want for women and what they really want, which I enjoyed a lot. So more later!