If one really believes that the metaphysic one adopts has much to commend it, then one should obviously try to persuade others of its truth or acceptability!

The subject of feminism cannot be purely a fiction, as some postmodern writers suggest, produced by the discourses of power.

If there are more than two sexes, then so be it and, of course, the assumption that there are two helps shape, as many have argued, the binary logic that underpins much of the history of western philosophy.

The universal basis for the categorisation 'woman' will, no doubt, be constantly shifting but it is important not to deny it's existence altogether. There is a partly biological basis for this identification. The 'nature' of woman may be conceptualised in the early Greek sense of a force or a power, in its turn shaped by forces outside it, rather than in terms of some set of properties.

If someone says that they have to 'tolerate' cultural differences and cultural groupings different from themselves then that may make it difficult, at the same time, to condemn unjust practices within those cultures.

From a political perspective, it is important to uphold certain universal principles so that, for example, you can condemn both Islamist forms of violence and injustice as well as forms of violence and injustice from other groups - some superpowers, for example, or the English Defence League, as other examples.

However, within the limits of the human, it is important to recognise our common humanity. I think that a perspective based on common human needs has the most chance of being accepted and this does not depend on any particular metaphysical outlook.