Abstract

This compact book provides a much needed study of Leibniz’ moral philosophy which, unfortunately, has not been given the attention that his metaphysics and logic have received. It is Hostler’s contention that this neglect is an indication that the moral system of Leibniz has been incorrectly viewed as tangential to his other systems which are supposed to be Leibniz’ primary concerns. On the contrary, as Hostler points out, Leibniz’ moral philosophy was largely completed before his metaphysical works which were intended to provide the principles for his ethical system. As Leibniz himself says in the New Essays, "you are more in the tradition of metaphysical thought, whereas I am more interested in ethics." Hostler embarks on his task by orienting us to Leibniz’s general metaphysics and proceeds throughout the study to show the interconnection between his morals and metaphysics. Leibniz’ ethics is traditionally grounded in that he acknowledges the essential relationship between the will, reason, and desire. At the same time he breaks with tradition by introducing two apparently contradictory motives for voluntary action. On one hand he proposes an egoism which aims at one’s own welfare, and on the other hand he proposes an altruism that demands that one should seek the welfare of the other. Hostler’s analysis of the concepts of the good, pleasure, happiness, and perfection shows that the contradiction is only apparent, and that egoism and altruism are reconcilable in Leibniz’ system. The good that I seek for myself is achieved when I do good for others, because in doing good to others I realize a perfection to some degree, and my awareness of that perfection is a source of pleasure which identifies itself as the consciousness of an increase in perfection. Hostler discusses the substantive part of Leibniz’ ethics wherein we find that love tempered by prudence produces justice, the demands of which are binding on all beings possessing reason and free will. Consequently, even God is subject to the moral imperative. As the ens perfectissimum God displays both perfect benevolence and wisdom in all his activities, hence he must create the best of all possible worlds, an act that Leibniz describes as "universal justice." Ultimately it can be seen that the reconciliation between egoism and altruism is explained through the principle of pre-established harmony for what affects one affects the others and every act has infinite consequences. It is only our finite intellect that prevents us from seeing the perfection in every object and thereby choosing it. The choice of the lesser good is a manifestation of that radical finitude. Hostler has presented us with a well organized study of Leibniz’ moral philosophy and has managed to situate it in terms of his philosophy as a whole. The brevity of the volume does not diminish its worth as a fine treatment of the subject.—K.R.M.