In 1723 a later edition appeared, including "An Essay on Charity and Charity Schools", and "A Search into the Nature of Society". The former essay criticised the charity schools, designed to educate the poor and, in doing so, instil virtue in them. Mandeville disagreed with the idea that education adds virtue because he did not believe that evil desires existed only in the poor, but rather he saw the educated and wealthy as much more crafty. Mandeville also believed that educating the poor increased their desires for material things, defeating the purpose of the school and making it more difficult to provide for them. It was vigorously combatted by, among others, Bishop Berkeley and William Law, author of "The Serious Call", and in 1729 was made the subject of a prosecution for its immoral tendency.