----------------- HES POSTING ----------------- Dear Rosaria This is only a rough guideline, but someone called Iona Tarrant at University of Hull did a PhD some years ago (she is now lecturing at Sheffield) on a comparison of Rousseau and Sen in relation to social welfare...'conflict between social welfare function and individual liberty', it says on the page (found by google on her name). Perhaps this is of help, Best wishes, Nitasha ------------ FOOTER TO HES POSTING ------------ For information, send the message "info HES" to [log in to unmask]