Mr. Curtis very justly remarks that it is important to ascertain an author’s views before criticising them, a truism which is not always acted on, as indeed was the case with Locke’s own critics. He does not, however, profess to criticise but, as the title of his work shows, to give an outline of Locke’s Ethical Philosophy. In his Preface he states that his author adopted the Stoic division of Philosophy into Physics, Ethics, and Logic. The object of Ethics, is described by Locke, in his noted “Essay,” as the seeking out of those rules and measures of human actions, which lead to happiness, and the means to practice them. The end of this, is not bare speculation, and the knowledge of truth; but _right_, and a conduct suitable to it. In the application of its principles Locke may be said to have gone further than any of his predecessors and of most of his successors. As pointed out by Mr. Curtis, he maintains that the institutions of government, religion, and education are, in essence, ethical and that all are parts of a system which must be based upon, and be in harmony with, the fundamental physiological and psychological principles of human nature. This follows from Locke’s principle that the Individual, and not the Family, is the real social unit. Man is a rational, social, religious, and political being, and, therefore, “in the individual is contained, potentially, all institutionalism.” It must be noticed, however, that to Locke the moral dynamic in human society is the concept of God. He regards this idea “as a natural, formal, necessary and transcendental principle at the root of human nature and institutions, and consistently declares that the denial of it dissolves all,” as it alone gives a sufficient explanation and sanction to the principles of morality. This brings us to the very foundation of ethics. All depends, however, on our conception of God. Locke maintained that duty “cannot be understood without a law, nor a law be known or supposed without a law giver, or without reward or punishment.” His conception of God, therefore, was that of a law-giver, and he believed that the existence of God could be demonstrated not only by teleological argument, but also by psychological proof drawn from the being and nature of man. Locke was so thoroughly convinced of the dependence of morality on the existence of God, that, notwithstanding his general liberality of thought, he excluded atheists from toleration. He writes: “Promises and Covenants, and Oaths, which are the bonds of human society, can have no hold upon an Atheist.”