a study on John Locke's theory a study in moral theory 劳动与财产：约翰·洛克思想研究：a study on John Locke's theory a study of Danto's art theory a study on Deleuze's art theory a study of the saka history a study on John Cobb's ecological theology a study of Gadamer's literary theory a study of agnes Heller's moral theory a study on O'Connor's capitalism crisis theory