These lectures present a systematic history of Western philosophy, beginning with the assimilation of Neo-Platonic ideas into Christian thought and the medieval synthesis, surveying Arabian and Jewish commentators, scholastic theologians and debates such as realism versus nominalism, and the revival of classical learning during the Renaissance. They then trace the emergence of modern approaches—empiricism, rationalism, and scientific methods—through figures associated with Bacon, Descartes, Spinoza, Locke, Leibniz, and others, and conclude with the transition to German Idealism and the critical philosophies that reshaped metaphysics and epistemology.