addams,democracy and social ethics,1902,newer ideals of peace,1907;santayana,the life of reason,vol.ii.,1905;bergemann,ethik als kulturphilosophie,1904,especially pp.154-304;wundt,ethics,vol.iii.,the principles of morality and the departments of the moral life (trans.1901);spencer,principles of ethics,1893,vol.ii.,principles of sociology,1882,vol.i.,part ii.;ritchie,studies in political and social ethics,1902;bosanquet philosophical theory of the state,1899;willoughby,social justice,1900;cooley,human nature and the social order,1902;paulsen,system der ethik,5th ed.,1900,book iv.;runze,praktische ethik,1891;janet,histoire de la science politique dans ses rapports avec la morale,3d ed.,1887;plato,the republic;aristotle,ethics,book v.,and politics(trans.by welldon,1883);hegel,philosophy of right(pub.1820,trans.by dyde,1896);mackenzie,an introduction to social philosophy,1890;dunning,history of political theories,vol.i.,1902,vol.ii.,1905;stein,die sociale frage im lichte der philosophie,1897.