Sentence:  To give a good and solid education to the gentle sex would tend to double the army of progress, to draw closer the domestic relations, and to annihilate that extra-conjugal society (the <WSD>"demi</WSD>"[-]<WSD>"monde</WSD>" of w:Alexandre Dumas fils 
Meaning of the word marked with <WSD> tags:  A class of women maintained by wealthy protectors; female courtesans or prostitutes as a group.