Sentence:  Civilisation has achieved a very elaborate woman, but the elaboration is unimportant from the point of view of science. It is decorative; the structure endures; the heart of modern woman is the heart of her savage ancestress dressed and adorned and furnished. This permanence of <WSD>muliebrity</WSD> serves to indicate the requirements of natural law. Woman may not depart from it to any considerable extent without impairing her position and nullifying her functions. 
Meaning of the word marked with <WSD> tags:  The state or quality of being a woman; the features of a woman's nature; femininity, womanhood.